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Finding the Third Proportional to 72,132 and 157,878

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Solution

The third proportional to 72,132 and 157,878 is: 345,553.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,132 : 157,878 = 157,878 : x
  2. Step 2: Convert to fraction form
    72,132/157,878 = 157,878/x
  3. Step 3: Cross multiply
    72,132x = 157,878 × 157,878
  4. Step 4: Simplify right side
    72,132x = 24,925,462,884
  5. Step 5: Solve for x
    x = 24,925,462,884/72,132
  6. Step 6: Final answer
    x = 345,553.47

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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.