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Finding the Fourth Proportional to 138,587.93, 191,251.36 and 74,925.71

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Solution

The fourth proportional to 138,587.93, 191,251.36 and 74,925.71 is: 103,397.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,587.93 : 191,251.36 = 74,925.71 : x
  2. Step 2: Convert to fraction form
    138,587.93/191,251.36 = 74,925.71/x
  3. Step 3: Cross multiply
    138,587.93x = 191,251.36 × 74,925.71
  4. Step 4: Simplify right side
    138,587.93x = 14,329,643,936.47
  5. Step 5: Solve for x
    x = 14,329,643,936.47/138,587.93
  6. Step 6: Final answer
    x = 103,397.49

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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.