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Finding the Fourth Proportional to 83.28, 124.98 and 58.75

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Solution

The fourth proportional to 83.28, 124.98 and 58.75 is: 88.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.28 : 124.98 = 58.75 : x
  2. Step 2: Convert to fraction form
    83.28/124.98 = 58.75/x
  3. Step 3: Cross multiply
    83.28x = 124.98 × 58.75
  4. Step 4: Simplify right side
    83.28x = 7,341.95
  5. Step 5: Solve for x
    x = 7,341.95/83.28
  6. Step 6: Final answer
    x = 88.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.