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Finding the Fourth Proportional to 91.01, 125.67 and 84.10

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Solution

The fourth proportional to 91.01, 125.67 and 84.10 is: 116.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.01 : 125.67 = 84.10 : x
  2. Step 2: Convert to fraction form
    91.01/125.67 = 84.10/x
  3. Step 3: Cross multiply
    91.01x = 125.67 × 84.10
  4. Step 4: Simplify right side
    91.01x = 10,568.69
  5. Step 5: Solve for x
    x = 10,568.69/91.01
  6. Step 6: Final answer
    x = 116.12

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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.