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Finding the Third Proportional to 56,132.50 and 66,512

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Solution

The third proportional to 56,132.50 and 66,512 is: 78,810.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,132.50 : 66,512 = 66,512 : x
  2. Step 2: Convert to fraction form
    56,132.50/66,512 = 66,512/x
  3. Step 3: Cross multiply
    56,132.50x = 66,512 × 66,512
  4. Step 4: Simplify right side
    56,132.50x = 4,423,846,144
  5. Step 5: Solve for x
    x = 4,423,846,144/56,132.50
  6. Step 6: Final answer
    x = 78,810.78

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.