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Finding the Fourth Proportional to 60.97, 91.45 and 39.55

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Solution

The fourth proportional to 60.97, 91.45 and 39.55 is: 59.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.97 : 91.45 = 39.55 : x
  2. Step 2: Convert to fraction form
    60.97/91.45 = 39.55/x
  3. Step 3: Cross multiply
    60.97x = 91.45 × 39.55
  4. Step 4: Simplify right side
    60.97x = 3,616.29
  5. Step 5: Solve for x
    x = 3,616.29/60.97
  6. Step 6: Final answer
    x = 59.32

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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.