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Finding the Third Proportional to 78,763.50 and 121,059

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Solution

The third proportional to 78,763.50 and 121,059 is: 186,066.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,763.50 : 121,059 = 121,059 : x
  2. Step 2: Convert to fraction form
    78,763.50/121,059 = 121,059/x
  3. Step 3: Cross multiply
    78,763.50x = 121,059 × 121,059
  4. Step 4: Simplify right side
    78,763.50x = 14,655,281,481
  5. Step 5: Solve for x
    x = 14,655,281,481/78,763.50
  6. Step 6: Final answer
    x = 186,066.92

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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.