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Finding the Fourth Proportional to 99,830,687.60, 149,746,031.40 and 66,952,204.40

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Solution

The fourth proportional to 99,830,687.60, 149,746,031.40 and 66,952,204.40 is: 100,428,306.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,830,687.60 : 149,746,031.40 = 66,952,204.40 : x
  2. Step 2: Convert to fraction form
    99,830,687.60/149,746,031.40 = 66,952,204.40/x
  3. Step 3: Cross multiply
    99,830,687.60x = 149,746,031.40 × 66,952,204.40
  4. Step 4: Simplify right side
    99,830,687.60x = 10,025,826,902,381,618
  5. Step 5: Solve for x
    x = 10,025,826,902,381,618/99,830,687.60
  6. Step 6: Final answer
    x = 100,428,306.60

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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.