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Finding the Fourth Proportional to 101.88, 140.60 and 63.07

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Solution

The fourth proportional to 101.88, 140.60 and 63.07 is: 87.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.88 : 140.60 = 63.07 : x
  2. Step 2: Convert to fraction form
    101.88/140.60 = 63.07/x
  3. Step 3: Cross multiply
    101.88x = 140.60 × 63.07
  4. Step 4: Simplify right side
    101.88x = 8,867.64
  5. Step 5: Solve for x
    x = 8,867.64/101.88
  6. Step 6: Final answer
    x = 87.04

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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.