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Finding the Fourth Proportional to 92.01, 126.84 and 72.57

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Solution

The fourth proportional to 92.01, 126.84 and 72.57 is: 100.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.01 : 126.84 = 72.57 : x
  2. Step 2: Convert to fraction form
    92.01/126.84 = 72.57/x
  3. Step 3: Cross multiply
    92.01x = 126.84 × 72.57
  4. Step 4: Simplify right side
    92.01x = 9,204.78
  5. Step 5: Solve for x
    x = 9,204.78/92.01
  6. Step 6: Final answer
    x = 100.04

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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.