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Finding the Fourth Proportional to 139.76, 208.48 and 136.04

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Solution

The fourth proportional to 139.76, 208.48 and 136.04 is: 202.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.76 : 208.48 = 136.04 : x
  2. Step 2: Convert to fraction form
    139.76/208.48 = 136.04/x
  3. Step 3: Cross multiply
    139.76x = 208.48 × 136.04
  4. Step 4: Simplify right side
    139.76x = 28,361.62
  5. Step 5: Solve for x
    x = 28,361.62/139.76
  6. Step 6: Final answer
    x = 202.93

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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.