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Finding the Fourth Proportional to 62.39, 93.50 and 47.90

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Solution

The fourth proportional to 62.39, 93.50 and 47.90 is: 71.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.39 : 93.50 = 47.90 : x
  2. Step 2: Convert to fraction form
    62.39/93.50 = 47.90/x
  3. Step 3: Cross multiply
    62.39x = 93.50 × 47.90
  4. Step 4: Simplify right side
    62.39x = 4,478.30
  5. Step 5: Solve for x
    x = 4,478.30/62.39
  6. Step 6: Final answer
    x = 71.78

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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.