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Finding the Fourth Proportional to 83.60, 126.12 and 82.91

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Solution

The fourth proportional to 83.60, 126.12 and 82.91 is: 125.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.60 : 126.12 = 82.91 : x
  2. Step 2: Convert to fraction form
    83.60/126.12 = 82.91/x
  3. Step 3: Cross multiply
    83.60x = 126.12 × 82.91
  4. Step 4: Simplify right side
    83.60x = 10,455.98
  5. Step 5: Solve for x
    x = 10,455.98/83.60
  6. Step 6: Final answer
    x = 125.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.