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Finding the Fourth Proportional to 138,963.96, 208,458.24 and 39,125.01

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Solution

The fourth proportional to 138,963.96, 208,458.24 and 39,125.01 is: 58,690.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,963.96 : 208,458.24 = 39,125.01 : x
  2. Step 2: Convert to fraction form
    138,963.96/208,458.24 = 39,125.01/x
  3. Step 3: Cross multiply
    138,963.96x = 208,458.24 × 39,125.01
  4. Step 4: Simplify right side
    138,963.96x = 8,155,930,724.58
  5. Step 5: Solve for x
    x = 8,155,930,724.58/138,963.96
  6. Step 6: Final answer
    x = 58,690.98

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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.