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Finding the Third Proportional to 78,126.19 and 110,620.69

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Solution

The third proportional to 78,126.19 and 110,620.69 is: 156,630.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,126.19 : 110,620.69 = 110,620.69 : x
  2. Step 2: Convert to fraction form
    78,126.19/110,620.69 = 110,620.69/x
  3. Step 3: Cross multiply
    78,126.19x = 110,620.69 × 110,620.69
  4. Step 4: Simplify right side
    78,126.19x = 12,236,936,502.97
  5. Step 5: Solve for x
    x = 12,236,936,502.97/78,126.19
  6. Step 6: Final answer
    x = 156,630.41

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.