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Finding the Fourth Proportional to 179.20, 247.28 and 120.08

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Solution

The fourth proportional to 179.20, 247.28 and 120.08 is: 165.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.20 : 247.28 = 120.08 : x
  2. Step 2: Convert to fraction form
    179.20/247.28 = 120.08/x
  3. Step 3: Cross multiply
    179.20x = 247.28 × 120.08
  4. Step 4: Simplify right side
    179.20x = 29,693.38
  5. Step 5: Solve for x
    x = 29,693.38/179.20
  6. Step 6: Final answer
    x = 165.70

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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.