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Finding the Fourth Proportional to 72,770,593.60, 109,155,890.40 and 21,645,969.40

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Solution

The fourth proportional to 72,770,593.60, 109,155,890.40 and 21,645,969.40 is: 32,468,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,770,593.60 : 109,155,890.40 = 21,645,969.40 : x
  2. Step 2: Convert to fraction form
    72,770,593.60/109,155,890.40 = 21,645,969.40/x
  3. Step 3: Cross multiply
    72,770,593.60x = 109,155,890.40 × 21,645,969.40
  4. Step 4: Simplify right side
    72,770,593.60x = 2,362,785,063,428,153.50
  5. Step 5: Solve for x
    x = 2,362,785,063,428,153.50/72,770,593.60
  6. Step 6: Final answer
    x = 32,468,954.10

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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.