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Finding the Third Proportional to 137,748.75 and 212,856.75

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Solution

The third proportional to 137,748.75 and 212,856.75 is: 328,917.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,748.75 : 212,856.75 = 212,856.75 : x
  2. Step 2: Convert to fraction form
    137,748.75/212,856.75 = 212,856.75/x
  3. Step 3: Cross multiply
    137,748.75x = 212,856.75 × 212,856.75
  4. Step 4: Simplify right side
    137,748.75x = 45,307,996,020.56
  5. Step 5: Solve for x
    x = 45,307,996,020.56/137,748.75
  6. Step 6: Final answer
    x = 328,917.66

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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.