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Finding the Fourth Proportional to 60.71, 83.73 and 38.91

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Solution

The fourth proportional to 60.71, 83.73 and 38.91 is: 53.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.71 : 83.73 = 38.91 : x
  2. Step 2: Convert to fraction form
    60.71/83.73 = 38.91/x
  3. Step 3: Cross multiply
    60.71x = 83.73 × 38.91
  4. Step 4: Simplify right side
    60.71x = 3,257.52
  5. Step 5: Solve for x
    x = 3,257.52/60.71
  6. Step 6: Final answer
    x = 53.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.