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Finding the Fourth Proportional to 138,502,409.60, 207,753,614.40 and 133,211,619.20

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Solution

The fourth proportional to 138,502,409.60, 207,753,614.40 and 133,211,619.20 is: 199,817,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,502,409.60 : 207,753,614.40 = 133,211,619.20 : x
  2. Step 2: Convert to fraction form
    138,502,409.60/207,753,614.40 = 133,211,619.20/x
  3. Step 3: Cross multiply
    138,502,409.60x = 207,753,614.40 × 133,211,619.20
  4. Step 4: Simplify right side
    138,502,409.60x = 27,675,195,368,876,436
  5. Step 5: Solve for x
    x = 27,675,195,368,876,436/138,502,409.60
  6. Step 6: Final answer
    x = 199,817,428.80

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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.