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Finding the Fourth Proportional to 62.72, 93.71 and 61.43

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Solution

The fourth proportional to 62.72, 93.71 and 61.43 is: 91.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.72 : 93.71 = 61.43 : x
  2. Step 2: Convert to fraction form
    62.72/93.71 = 61.43/x
  3. Step 3: Cross multiply
    62.72x = 93.71 × 61.43
  4. Step 4: Simplify right side
    62.72x = 5,756.74
  5. Step 5: Solve for x
    x = 5,756.74/62.72
  6. Step 6: Final answer
    x = 91.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.