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Finding the Third Proportional to 123 and 157.88

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Solution

The third proportional to 123 and 157.88 is: 202.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    123 : 157.88 = 157.88 : x
  2. Step 2: Convert to fraction form
    123/157.88 = 157.88/x
  3. Step 3: Cross multiply
    123x = 157.88 × 157.88
  4. Step 4: Simplify right side
    123x = 24,924.52
  5. Step 5: Solve for x
    x = 24,924.52/123
  6. Step 6: Final answer
    x = 202.64

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.