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Finding the Fourth Proportional to 178.72, 246.68 and 101.12

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Solution

The fourth proportional to 178.72, 246.68 and 101.12 is: 139.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.72 : 246.68 = 101.12 : x
  2. Step 2: Convert to fraction form
    178.72/246.68 = 101.12/x
  3. Step 3: Cross multiply
    178.72x = 246.68 × 101.12
  4. Step 4: Simplify right side
    178.72x = 24,944.28
  5. Step 5: Solve for x
    x = 24,944.28/178.72
  6. Step 6: Final answer
    x = 139.57

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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.