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Finding the Fourth Proportional to 231,071.65, 318,873.00 and 129,097.87

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Solution

The fourth proportional to 231,071.65, 318,873.00 and 129,097.87 is: 178,151.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,071.65 : 318,873.00 = 129,097.87 : x
  2. Step 2: Convert to fraction form
    231,071.65/318,873.00 = 129,097.87/x
  3. Step 3: Cross multiply
    231,071.65x = 318,873.00 × 129,097.87
  4. Step 4: Simplify right side
    231,071.65x = 41,165,825,854.93
  5. Step 5: Solve for x
    x = 41,165,825,854.93/231,071.65
  6. Step 6: Final answer
    x = 178,151.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.