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Finding the Third Proportional to 42,680.25 and 66,312.75

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Solution

The third proportional to 42,680.25 and 66,312.75 is: 103,030.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,680.25 : 66,312.75 = 66,312.75 : x
  2. Step 2: Convert to fraction form
    42,680.25/66,312.75 = 66,312.75/x
  3. Step 3: Cross multiply
    42,680.25x = 66,312.75 × 66,312.75
  4. Step 4: Simplify right side
    42,680.25x = 4,397,380,812.56
  5. Step 5: Solve for x
    x = 4,397,380,812.56/42,680.25
  6. Step 6: Final answer
    x = 103,030.81

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.