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Finding the Third Proportional to 78,387 and 119,221.50

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Solution

The third proportional to 78,387 and 119,221.50 is: 181,328.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,387 : 119,221.50 = 119,221.50 : x
  2. Step 2: Convert to fraction form
    78,387/119,221.50 = 119,221.50/x
  3. Step 3: Cross multiply
    78,387x = 119,221.50 × 119,221.50
  4. Step 4: Simplify right side
    78,387x = 14,213,766,062.25
  5. Step 5: Solve for x
    x = 14,213,766,062.25/78,387
  6. Step 6: Final answer
    x = 181,328.10

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.