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Finding the Fourth Proportional to 101.32, 138.97 and 93.76

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Solution

The fourth proportional to 101.32, 138.97 and 93.76 is: 128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.32 : 138.97 = 93.76 : x
  2. Step 2: Convert to fraction form
    101.32/138.97 = 93.76/x
  3. Step 3: Cross multiply
    101.32x = 138.97 × 93.76
  4. Step 4: Simplify right side
    101.32x = 13,029.83
  5. Step 5: Solve for x
    x = 13,029.83/101.32
  6. Step 6: Final answer
    x = 128.60

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.