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Finding the Fourth Proportional to 91.02, 125.52 and 59.92

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Solution

The fourth proportional to 91.02, 125.52 and 59.92 is: 82.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.02 : 125.52 = 59.92 : x
  2. Step 2: Convert to fraction form
    91.02/125.52 = 59.92/x
  3. Step 3: Cross multiply
    91.02x = 125.52 × 59.92
  4. Step 4: Simplify right side
    91.02x = 7,521.05
  5. Step 5: Solve for x
    x = 7,521.05/91.02
  6. Step 6: Final answer
    x = 82.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.