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Finding the Third Proportional to 117.42 and 157.92

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Solution

The third proportional to 117.42 and 157.92 is: 212.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.42 : 157.92 = 157.92 : x
  2. Step 2: Convert to fraction form
    117.42/157.92 = 157.92/x
  3. Step 3: Cross multiply
    117.42x = 157.92 × 157.92
  4. Step 4: Simplify right side
    117.42x = 24,939.32
  5. Step 5: Solve for x
    x = 24,939.32/117.42
  6. Step 6: Final answer
    x = 212.39

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.