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Finding the Fourth Proportional to 66.61, 91.97 and 60.04

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Solution

The fourth proportional to 66.61, 91.97 and 60.04 is: 82.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.61 : 91.97 = 60.04 : x
  2. Step 2: Convert to fraction form
    66.61/91.97 = 60.04/x
  3. Step 3: Cross multiply
    66.61x = 91.97 × 60.04
  4. Step 4: Simplify right side
    66.61x = 5,521.88
  5. Step 5: Solve for x
    x = 5,521.88/66.61
  6. Step 6: Final answer
    x = 82.90

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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.