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Finding the Fourth Proportional to 138,436.60, 207,666.60 and 38,596.88

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Solution

The fourth proportional to 138,436.60, 207,666.60 and 38,596.88 is: 57,898.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,436.60 : 207,666.60 = 38,596.88 : x
  2. Step 2: Convert to fraction form
    138,436.60/207,666.60 = 38,596.88/x
  3. Step 3: Cross multiply
    138,436.60x = 207,666.60 × 38,596.88
  4. Step 4: Simplify right side
    138,436.60x = 8,015,281,801.88
  5. Step 5: Solve for x
    x = 8,015,281,801.88/138,436.60
  6. Step 6: Final answer
    x = 57,898.58

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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.