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Finding the Fourth Proportional to 66.23, 90.92 and 60.76

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Solution

The fourth proportional to 66.23, 90.92 and 60.76 is: 83.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.23 : 90.92 = 60.76 : x
  2. Step 2: Convert to fraction form
    66.23/90.92 = 60.76/x
  3. Step 3: Cross multiply
    66.23x = 90.92 × 60.76
  4. Step 4: Simplify right side
    66.23x = 5,524.30
  5. Step 5: Solve for x
    x = 5,524.30/66.23
  6. Step 6: Final answer
    x = 83.41

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.