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Finding the Fourth Proportional to 178.86, 246.80 and 113.46

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Solution

The fourth proportional to 178.86, 246.80 and 113.46 is: 156.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.86 : 246.80 = 113.46 : x
  2. Step 2: Convert to fraction form
    178.86/246.80 = 113.46/x
  3. Step 3: Cross multiply
    178.86x = 246.80 × 113.46
  4. Step 4: Simplify right side
    178.86x = 28,001.93
  5. Step 5: Solve for x
    x = 28,001.93/178.86
  6. Step 6: Final answer
    x = 156.56

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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.