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Finding the Fourth Proportional to 139.47, 192.56 and 95.87

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Solution

The fourth proportional to 139.47, 192.56 and 95.87 is: 132.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.47 : 192.56 = 95.87 : x
  2. Step 2: Convert to fraction form
    139.47/192.56 = 95.87/x
  3. Step 3: Cross multiply
    139.47x = 192.56 × 95.87
  4. Step 4: Simplify right side
    139.47x = 18,459.29
  5. Step 5: Solve for x
    x = 18,459.29/139.47
  6. Step 6: Final answer
    x = 132.35

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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.