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Finding the Fourth Proportional to 62.69, 93.97 and 39.87

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Solution

The fourth proportional to 62.69, 93.97 and 39.87 is: 59.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.69 : 93.97 = 39.87 : x
  2. Step 2: Convert to fraction form
    62.69/93.97 = 39.87/x
  3. Step 3: Cross multiply
    62.69x = 93.97 × 39.87
  4. Step 4: Simplify right side
    62.69x = 3,746.43
  5. Step 5: Solve for x
    x = 3,746.43/62.69
  6. Step 6: Final answer
    x = 59.76

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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.