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Finding the Fourth Proportional to 139.55, 192.61 and 125.71

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Solution

The fourth proportional to 139.55, 192.61 and 125.71 is: 173.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.55 : 192.61 = 125.71 : x
  2. Step 2: Convert to fraction form
    139.55/192.61 = 125.71/x
  3. Step 3: Cross multiply
    139.55x = 192.61 × 125.71
  4. Step 4: Simplify right side
    139.55x = 24,213.00
  5. Step 5: Solve for x
    x = 24,213.00/139.55
  6. Step 6: Final answer
    x = 173.51

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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.