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Finding the Third Proportional to 91,772 and 129,236

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Solution

The third proportional to 91,772 and 129,236 is: 181,993.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,772 : 129,236 = 129,236 : x
  2. Step 2: Convert to fraction form
    91,772/129,236 = 129,236/x
  3. Step 3: Cross multiply
    91,772x = 129,236 × 129,236
  4. Step 4: Simplify right side
    91,772x = 16,701,943,696
  5. Step 5: Solve for x
    x = 16,701,943,696/91,772
  6. Step 6: Final answer
    x = 181,993.89

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.