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Finding the Fourth Proportional to 138,772.58, 208,171.94 and 38,932.39

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Solution

The fourth proportional to 138,772.58, 208,171.94 and 38,932.39 is: 58,402.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,772.58 : 208,171.94 = 38,932.39 : x
  2. Step 2: Convert to fraction form
    138,772.58/208,171.94 = 38,932.39/x
  3. Step 3: Cross multiply
    138,772.58x = 208,171.94 × 38,932.39
  4. Step 4: Simplify right side
    138,772.58x = 8,104,630,440.04
  5. Step 5: Solve for x
    x = 8,104,630,440.04/138,772.58
  6. Step 6: Final answer
    x = 58,402.25

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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.