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Finding the Fourth Proportional to 100.02, 137.97 and 63.11

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Solution

The fourth proportional to 100.02, 137.97 and 63.11 is: 87.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.02 : 137.97 = 63.11 : x
  2. Step 2: Convert to fraction form
    100.02/137.97 = 63.11/x
  3. Step 3: Cross multiply
    100.02x = 137.97 × 63.11
  4. Step 4: Simplify right side
    100.02x = 8,706.97
  5. Step 5: Solve for x
    x = 8,706.97/100.02
  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.