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Finding the Fourth Proportional to 60.17, 90 and 54.12

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Solution

The fourth proportional to 60.17, 90 and 54.12 is: 80.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.17 : 90 = 54.12 : x
  2. Step 2: Convert to fraction form
    60.17/90 = 54.12/x
  3. Step 3: Cross multiply
    60.17x = 90 × 54.12
  4. Step 4: Simplify right side
    60.17x = 4,870.80
  5. Step 5: Solve for x
    x = 4,870.80/60.17
  6. Step 6: Final answer
    x = 80.95

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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.