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Finding the Fourth Proportional to 139.01, 192.05 and 118.52

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Solution

The fourth proportional to 139.01, 192.05 and 118.52 is: 163.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.01 : 192.05 = 118.52 : x
  2. Step 2: Convert to fraction form
    139.01/192.05 = 118.52/x
  3. Step 3: Cross multiply
    139.01x = 192.05 × 118.52
  4. Step 4: Simplify right side
    139.01x = 22,761.77
  5. Step 5: Solve for x
    x = 22,761.77/139.01
  6. Step 6: Final answer
    x = 163.74

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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.