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Finding the Fourth Proportional to 91.04, 125.44 and 84.39

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Solution

The fourth proportional to 91.04, 125.44 and 84.39 is: 116.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.04 : 125.44 = 84.39 : x
  2. Step 2: Convert to fraction form
    91.04/125.44 = 84.39/x
  3. Step 3: Cross multiply
    91.04x = 125.44 × 84.39
  4. Step 4: Simplify right side
    91.04x = 10,585.20
  5. Step 5: Solve for x
    x = 10,585.20/91.04
  6. Step 6: Final answer
    x = 116.28

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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.