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Finding the Third Proportional to 89,908 and 129,507

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Solution

The third proportional to 89,908 and 129,507 is: 186,546.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,908 : 129,507 = 129,507 : x
  2. Step 2: Convert to fraction form
    89,908/129,507 = 129,507/x
  3. Step 3: Cross multiply
    89,908x = 129,507 × 129,507
  4. Step 4: Simplify right side
    89,908x = 16,772,063,049
  5. Step 5: Solve for x
    x = 16,772,063,049/89,908
  6. Step 6: Final answer
    x = 186,546.95

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.