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Finding the Fourth Proportional to 139.01, 191.48 and 97.56

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Solution

The fourth proportional to 139.01, 191.48 and 97.56 is: 134.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.01 : 191.48 = 97.56 : x
  2. Step 2: Convert to fraction form
    139.01/191.48 = 97.56/x
  3. Step 3: Cross multiply
    139.01x = 191.48 × 97.56
  4. Step 4: Simplify right side
    139.01x = 18,680.30
  5. Step 5: Solve for x
    x = 18,680.30/139.01
  6. Step 6: Final answer
    x = 134.39

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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.