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Finding the Fourth Proportional to 83.80, 115.54 and 63.01

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Solution

The fourth proportional to 83.80, 115.54 and 63.01 is: 86.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.80 : 115.54 = 63.01 : x
  2. Step 2: Convert to fraction form
    83.80/115.54 = 63.01/x
  3. Step 3: Cross multiply
    83.80x = 115.54 × 63.01
  4. Step 4: Simplify right side
    83.80x = 7,280.18
  5. Step 5: Solve for x
    x = 7,280.18/83.80
  6. Step 6: Final answer
    x = 86.88

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.