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Finding the Fourth Proportional to 73.20, 100.69 and 63.29

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Solution

The fourth proportional to 73.20, 100.69 and 63.29 is: 87.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.20 : 100.69 = 63.29 : x
  2. Step 2: Convert to fraction form
    73.20/100.69 = 63.29/x
  3. Step 3: Cross multiply
    73.20x = 100.69 × 63.29
  4. Step 4: Simplify right side
    73.20x = 6,372.53
  5. Step 5: Solve for x
    x = 6,372.53/73.20
  6. Step 6: Final answer
    x = 87.06

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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.