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Finding the Fourth Proportional to 91.02, 136.28 and 63.53

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Solution

The fourth proportional to 91.02, 136.28 and 63.53 is: 95.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.02 : 136.28 = 63.53 : x
  2. Step 2: Convert to fraction form
    91.02/136.28 = 63.53/x
  3. Step 3: Cross multiply
    91.02x = 136.28 × 63.53
  4. Step 4: Simplify right side
    91.02x = 8,658.62
  5. Step 5: Solve for x
    x = 8,658.62/91.02
  6. Step 6: Final answer
    x = 95.12

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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.