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Finding the Fourth Proportional to 51,408.20, 72,029.80 and 51,408.20

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Solution

The fourth proportional to 51,408.20, 72,029.80 and 51,408.20 is: 72,029.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,408.20 : 72,029.80 = 51,408.20 : x
  2. Step 2: Convert to fraction form
    51,408.20/72,029.80 = 51,408.20/x
  3. Step 3: Cross multiply
    51,408.20x = 72,029.80 × 51,408.20
  4. Step 4: Simplify right side
    51,408.20x = 3,702,922,364.36
  5. Step 5: Solve for x
    x = 3,702,922,364.36/51,408.20
  6. Step 6: Final answer
    x = 72,029.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.