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Finding the Fourth Proportional to 179.60, 247.80 and 140.72

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Solution

The fourth proportional to 179.60, 247.80 and 140.72 is: 194.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.60 : 247.80 = 140.72 : x
  2. Step 2: Convert to fraction form
    179.60/247.80 = 140.72/x
  3. Step 3: Cross multiply
    179.60x = 247.80 × 140.72
  4. Step 4: Simplify right side
    179.60x = 34,870.42
  5. Step 5: Solve for x
    x = 34,870.42/179.60
  6. Step 6: Final answer
    x = 194.16

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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.