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Finding the Third Proportional to 121,815 and 187,480

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Solution

The third proportional to 121,815 and 187,480 is: 288,542.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,815 : 187,480 = 187,480 : x
  2. Step 2: Convert to fraction form
    121,815/187,480 = 187,480/x
  3. Step 3: Cross multiply
    121,815x = 187,480 × 187,480
  4. Step 4: Simplify right side
    121,815x = 35,148,750,400
  5. Step 5: Solve for x
    x = 35,148,750,400/121,815
  6. Step 6: Final answer
    x = 288,542.05

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.