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Finding the Fourth Proportional to 137,801,619.20, 206,702,428.80 and 89,015,335.40

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Solution

The fourth proportional to 137,801,619.20, 206,702,428.80 and 89,015,335.40 is: 133,523,003.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,801,619.20 : 206,702,428.80 = 89,015,335.40 : x
  2. Step 2: Convert to fraction form
    137,801,619.20/206,702,428.80 = 89,015,335.40/x
  3. Step 3: Cross multiply
    137,801,619.20x = 206,702,428.80 × 89,015,335.40
  4. Step 4: Simplify right side
    137,801,619.20x = 18,399,686,027,626,620
  5. Step 5: Solve for x
    x = 18,399,686,027,626,620/137,801,619.20
  6. Step 6: Final answer
    x = 133,523,003.10

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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.