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Finding the Fourth Proportional to 139.32, 191.52 and 136.08

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Solution

The fourth proportional to 139.32, 191.52 and 136.08 is: 187.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.32 : 191.52 = 136.08 : x
  2. Step 2: Convert to fraction form
    139.32/191.52 = 136.08/x
  3. Step 3: Cross multiply
    139.32x = 191.52 × 136.08
  4. Step 4: Simplify right side
    139.32x = 26,062.04
  5. Step 5: Solve for x
    x = 26,062.04/139.32
  6. Step 6: Final answer
    x = 187.07

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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.