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Finding the Fourth Proportional to 124.63, 171.78 and 113.08

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Solution

The fourth proportional to 124.63, 171.78 and 113.08 is: 155.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.63 : 171.78 = 113.08 : x
  2. Step 2: Convert to fraction form
    124.63/171.78 = 113.08/x
  3. Step 3: Cross multiply
    124.63x = 171.78 × 113.08
  4. Step 4: Simplify right side
    124.63x = 19,424.88
  5. Step 5: Solve for x
    x = 19,424.88/124.63
  6. Step 6: Final answer
    x = 155.86

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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.