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Finding the Fourth Proportional to 139.01, 207.32 and 118.58

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Solution

The fourth proportional to 139.01, 207.32 and 118.58 is: 176.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.01 : 207.32 = 118.58 : x
  2. Step 2: Convert to fraction form
    139.01/207.32 = 118.58/x
  3. Step 3: Cross multiply
    139.01x = 207.32 × 118.58
  4. Step 4: Simplify right side
    139.01x = 24,584.01
  5. Step 5: Solve for x
    x = 24,584.01/139.01
  6. Step 6: Final answer
    x = 176.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.