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Finding the Fourth Proportional to 178.92, 247.28 and 135.18

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Solution

The fourth proportional to 178.92, 247.28 and 135.18 is: 186.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.92 : 247.28 = 135.18 : x
  2. Step 2: Convert to fraction form
    178.92/247.28 = 135.18/x
  3. Step 3: Cross multiply
    178.92x = 247.28 × 135.18
  4. Step 4: Simplify right side
    178.92x = 33,426.63
  5. Step 5: Solve for x
    x = 33,426.63/178.92
  6. Step 6: Final answer
    x = 186.82

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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.