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Finding the Fourth Proportional to 179.40, 247.50 and 137.88

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Solution

The fourth proportional to 179.40, 247.50 and 137.88 is: 190.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.40 : 247.50 = 137.88 : x
  2. Step 2: Convert to fraction form
    179.40/247.50 = 137.88/x
  3. Step 3: Cross multiply
    179.40x = 247.50 × 137.88
  4. Step 4: Simplify right side
    179.40x = 34,125.30
  5. Step 5: Solve for x
    x = 34,125.30/179.40
  6. Step 6: Final answer
    x = 190.22

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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.