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Finding the Fourth Proportional to 92.62, 139.20 and 60.76

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Solution

The fourth proportional to 92.62, 139.20 and 60.76 is: 91.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.62 : 139.20 = 60.76 : x
  2. Step 2: Convert to fraction form
    92.62/139.20 = 60.76/x
  3. Step 3: Cross multiply
    92.62x = 139.20 × 60.76
  4. Step 4: Simplify right side
    92.62x = 8,457.79
  5. Step 5: Solve for x
    x = 8,457.79/92.62
  6. Step 6: Final answer
    x = 91.32

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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.