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Finding the Fourth Proportional to 139.17, 207.06 and 136.44

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Solution

The fourth proportional to 139.17, 207.06 and 136.44 is: 203.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.17 : 207.06 = 136.44 : x
  2. Step 2: Convert to fraction form
    139.17/207.06 = 136.44/x
  3. Step 3: Cross multiply
    139.17x = 207.06 × 136.44
  4. Step 4: Simplify right side
    139.17x = 28,251.27
  5. Step 5: Solve for x
    x = 28,251.27/139.17
  6. Step 6: Final answer
    x = 203.00

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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.