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Finding the Third Proportional to 55,242.50 and 86,418

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Solution

The third proportional to 55,242.50 and 86,418 is: 135,187.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,242.50 : 86,418 = 86,418 : x
  2. Step 2: Convert to fraction form
    55,242.50/86,418 = 86,418/x
  3. Step 3: Cross multiply
    55,242.50x = 86,418 × 86,418
  4. Step 4: Simplify right side
    55,242.50x = 7,468,070,724
  5. Step 5: Solve for x
    x = 7,468,070,724/55,242.50
  6. Step 6: Final answer
    x = 135,187.05

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.