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Finding the Fourth Proportional to 139.42, 192.18 and 95.68

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Solution

The fourth proportional to 139.42, 192.18 and 95.68 is: 131.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.42 : 192.18 = 95.68 : x
  2. Step 2: Convert to fraction form
    139.42/192.18 = 95.68/x
  3. Step 3: Cross multiply
    139.42x = 192.18 × 95.68
  4. Step 4: Simplify right side
    139.42x = 18,387.78
  5. Step 5: Solve for x
    x = 18,387.78/139.42
  6. Step 6: Final answer
    x = 131.89

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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.