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Finding the Third Proportional to 72.19 and 157.88

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Solution

The third proportional to 72.19 and 157.88 is: 345.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.19 : 157.88 = 157.88 : x
  2. Step 2: Convert to fraction form
    72.19/157.88 = 157.88/x
  3. Step 3: Cross multiply
    72.19x = 157.88 × 157.88
  4. Step 4: Simplify right side
    72.19x = 24,924.52
  5. Step 5: Solve for x
    x = 24,924.52/72.19
  6. Step 6: Final answer
    x = 345.27

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.