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Finding the Fourth Proportional to 287,375.38, 431,063.10 and 87,696.81

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Solution

The fourth proportional to 287,375.38, 431,063.10 and 87,696.81 is: 131,545.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,375.38 : 431,063.10 = 87,696.81 : x
  2. Step 2: Convert to fraction form
    287,375.38/431,063.10 = 87,696.81/x
  3. Step 3: Cross multiply
    287,375.38x = 431,063.10 × 87,696.81
  4. Step 4: Simplify right side
    287,375.38x = 37,802,858,778.71
  5. Step 5: Solve for x
    x = 37,802,858,778.71/287,375.38
  6. Step 6: Final answer
    x = 131,545.23

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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.