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Finding the Third Proportional to 68,458 and 91,572

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Solution

The third proportional to 68,458 and 91,572 is: 122,490.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,458 : 91,572 = 91,572 : x
  2. Step 2: Convert to fraction form
    68,458/91,572 = 91,572/x
  3. Step 3: Cross multiply
    68,458x = 91,572 × 91,572
  4. Step 4: Simplify right side
    68,458x = 8,385,431,184
  5. Step 5: Solve for x
    x = 8,385,431,184/68,458
  6. Step 6: Final answer
    x = 122,490.16

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.