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Finding the Third Proportional to 124.88 and 145.55

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Solution

The third proportional to 124.88 and 145.55 is: 169.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.88 : 145.55 = 145.55 : x
  2. Step 2: Convert to fraction form
    124.88/145.55 = 145.55/x
  3. Step 3: Cross multiply
    124.88x = 145.55 × 145.55
  4. Step 4: Simplify right side
    124.88x = 21,183.89
  5. Step 5: Solve for x
    x = 21,183.89/124.88
  6. Step 6: Final answer
    x = 169.64

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.