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Finding the Fourth Proportional to 68,938.53, 103,437.10 and 38,956.88

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Solution

The fourth proportional to 68,938.53, 103,437.10 and 38,956.88 is: 58,451.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,938.53 : 103,437.10 = 38,956.88 : x
  2. Step 2: Convert to fraction form
    68,938.53/103,437.10 = 38,956.88/x
  3. Step 3: Cross multiply
    68,938.53x = 103,437.10 × 38,956.88
  4. Step 4: Simplify right side
    68,938.53x = 4,029,586,999.54
  5. Step 5: Solve for x
    x = 4,029,586,999.54/68,938.53
  6. Step 6: Final answer
    x = 58,451.89

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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.