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Finding the Fourth Proportional to 124.40, 170.86 and 113.96

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Solution

The fourth proportional to 124.40, 170.86 and 113.96 is: 156.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.40 : 170.86 = 113.96 : x
  2. Step 2: Convert to fraction form
    124.40/170.86 = 113.96/x
  3. Step 3: Cross multiply
    124.40x = 170.86 × 113.96
  4. Step 4: Simplify right side
    124.40x = 19,471.21
  5. Step 5: Solve for x
    x = 19,471.21/124.40
  6. Step 6: Final answer
    x = 156.52

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.