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Finding the Fourth Proportional to 178.13, 245.84 and 99.48

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Solution

The fourth proportional to 178.13, 245.84 and 99.48 is: 137.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.13 : 245.84 = 99.48 : x
  2. Step 2: Convert to fraction form
    178.13/245.84 = 99.48/x
  3. Step 3: Cross multiply
    178.13x = 245.84 × 99.48
  4. Step 4: Simplify right side
    178.13x = 24,456.16
  5. Step 5: Solve for x
    x = 24,456.16/178.13
  6. Step 6: Final answer
    x = 137.29

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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.