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Finding the Third Proportional to 72,976 and 157,209

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Solution

The third proportional to 72,976 and 157,209 is: 338,668.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,976 : 157,209 = 157,209 : x
  2. Step 2: Convert to fraction form
    72,976/157,209 = 157,209/x
  3. Step 3: Cross multiply
    72,976x = 157,209 × 157,209
  4. Step 4: Simplify right side
    72,976x = 24,714,669,681
  5. Step 5: Solve for x
    x = 24,714,669,681/72,976
  6. Step 6: Final answer
    x = 338,668.46

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.