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Finding the Fourth Proportional to 138,703.92, 208,036.71 and 59,807.88

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Solution

The fourth proportional to 138,703.92, 208,036.71 and 59,807.88 is: 89,703.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,703.92 : 208,036.71 = 59,807.88 : x
  2. Step 2: Convert to fraction form
    138,703.92/208,036.71 = 59,807.88/x
  3. Step 3: Cross multiply
    138,703.92x = 208,036.71 × 59,807.88
  4. Step 4: Simplify right side
    138,703.92x = 12,442,234,587.27
  5. Step 5: Solve for x
    x = 12,442,234,587.27/138,703.92
  6. Step 6: Final answer
    x = 89,703.55

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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.