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Finding the Third Proportional to 129,387 and 193,276.50

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Solution

The third proportional to 129,387 and 193,276.50 is: 288,713.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,387 : 193,276.50 = 193,276.50 : x
  2. Step 2: Convert to fraction form
    129,387/193,276.50 = 193,276.50/x
  3. Step 3: Cross multiply
    129,387x = 193,276.50 × 193,276.50
  4. Step 4: Simplify right side
    129,387x = 37,355,805,452.25
  5. Step 5: Solve for x
    x = 37,355,805,452.25/129,387
  6. Step 6: Final answer
    x = 288,713.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.