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Finding the Third Proportional to 90,866.81 and 129,215.25

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Solution

The third proportional to 90,866.81 and 129,215.25 is: 183,747.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,866.81 : 129,215.25 = 129,215.25 : x
  2. Step 2: Convert to fraction form
    90,866.81/129,215.25 = 129,215.25/x
  3. Step 3: Cross multiply
    90,866.81x = 129,215.25 × 129,215.25
  4. Step 4: Simplify right side
    90,866.81x = 16,696,580,832.56
  5. Step 5: Solve for x
    x = 16,696,580,832.56/90,866.81
  6. Step 6: Final answer
    x = 183,747.84

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.