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Finding the Fourth Proportional to 138,605.48, 207,913.41 and 62,689.58

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Solution

The fourth proportional to 138,605.48, 207,913.41 and 62,689.58 is: 94,036.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,605.48 : 207,913.41 = 62,689.58 : x
  2. Step 2: Convert to fraction form
    138,605.48/207,913.41 = 62,689.58/x
  3. Step 3: Cross multiply
    138,605.48x = 207,913.41 × 62,689.58
  4. Step 4: Simplify right side
    138,605.48x = 13,034,003,309.70
  5. Step 5: Solve for x
    x = 13,034,003,309.70/138,605.48
  6. Step 6: Final answer
    x = 94,036.71

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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.