Home / 81,605,643.60-122,408,465.40-21,021,369.60

Finding the Fourth Proportional to 81,605,643.60, 122,408,465.40 and 21,021,369.60

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Solution

The fourth proportional to 81,605,643.60, 122,408,465.40 and 21,021,369.60 is: 31,532,054.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,605,643.60 : 122,408,465.40 = 21,021,369.60 : x
  2. Step 2: Convert to fraction form
    81,605,643.60/122,408,465.40 = 21,021,369.60/x
  3. Step 3: Cross multiply
    81,605,643.60x = 122,408,465.40 × 21,021,369.60
  4. Step 4: Simplify right side
    81,605,643.60x = 2,573,193,593,342,212
  5. Step 5: Solve for x
    x = 2,573,193,593,342,212/81,605,643.60
  6. Step 6: Final answer
    x = 31,532,054.40

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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.