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Finding the Fourth Proportional to 83.03, 124.32 and 72.19

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Solution

The fourth proportional to 83.03, 124.32 and 72.19 is: 108.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.03 : 124.32 = 72.19 : x
  2. Step 2: Convert to fraction form
    83.03/124.32 = 72.19/x
  3. Step 3: Cross multiply
    83.03x = 124.32 × 72.19
  4. Step 4: Simplify right side
    83.03x = 8,974.04
  5. Step 5: Solve for x
    x = 8,974.04/83.03
  6. Step 6: Final answer
    x = 108.08

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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.