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Finding the Fourth Proportional to 139.35, 192.06 and 95.61

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Solution

The fourth proportional to 139.35, 192.06 and 95.61 is: 131.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.35 : 192.06 = 95.61 : x
  2. Step 2: Convert to fraction form
    139.35/192.06 = 95.61/x
  3. Step 3: Cross multiply
    139.35x = 192.06 × 95.61
  4. Step 4: Simplify right side
    139.35x = 18,362.86
  5. Step 5: Solve for x
    x = 18,362.86/139.35
  6. Step 6: Final answer
    x = 131.78

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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.