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Finding the Third Proportional to 89,121.50 and 129,669

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Solution

The third proportional to 89,121.50 and 129,669 is: 188,664.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,121.50 : 129,669 = 129,669 : x
  2. Step 2: Convert to fraction form
    89,121.50/129,669 = 129,669/x
  3. Step 3: Cross multiply
    89,121.50x = 129,669 × 129,669
  4. Step 4: Simplify right side
    89,121.50x = 16,814,049,561
  5. Step 5: Solve for x
    x = 16,814,049,561/89,121.50
  6. Step 6: Final answer
    x = 188,664.35

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.