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Finding the Fourth Proportional to 124.60, 171.66 and 113.08

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Solution

The fourth proportional to 124.60, 171.66 and 113.08 is: 155.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.60 : 171.66 = 113.08 : x
  2. Step 2: Convert to fraction form
    124.60/171.66 = 113.08/x
  3. Step 3: Cross multiply
    124.60x = 171.66 × 113.08
  4. Step 4: Simplify right side
    124.60x = 19,411.31
  5. Step 5: Solve for x
    x = 19,411.31/124.60
  6. Step 6: Final answer
    x = 155.79

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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.