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Finding the Fourth Proportional to 83.46, 124.58 and 72.08

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Solution

The fourth proportional to 83.46, 124.58 and 72.08 is: 107.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.46 : 124.58 = 72.08 : x
  2. Step 2: Convert to fraction form
    83.46/124.58 = 72.08/x
  3. Step 3: Cross multiply
    83.46x = 124.58 × 72.08
  4. Step 4: Simplify right side
    83.46x = 8,979.28
  5. Step 5: Solve for x
    x = 8,979.28/83.46
  6. Step 6: Final answer
    x = 107.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.