Home / 81,605,674.35-122,408,511.53-21,021,400.35

Finding the Fourth Proportional to 81,605,674.35, 122,408,511.53 and 21,021,400.35

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Solution

The fourth proportional to 81,605,674.35, 122,408,511.53 and 21,021,400.35 is: 31,532,100.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,605,674.35 : 122,408,511.53 = 21,021,400.35 : x
  2. Step 2: Convert to fraction form
    81,605,674.35/122,408,511.53 = 21,021,400.35/x
  3. Step 3: Cross multiply
    81,605,674.35x = 122,408,511.53 × 21,021,400.35
  4. Step 4: Simplify right side
    81,605,674.35x = 2,573,198,327,014,614.50
  5. Step 5: Solve for x
    x = 2,573,198,327,014,614.50/81,605,674.35
  6. Step 6: Final answer
    x = 31,532,100.53

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.