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Finding the Third Proportional to 51,842.50 and 80,428

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Solution

The third proportional to 51,842.50 and 80,428 is: 124,775.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,842.50 : 80,428 = 80,428 : x
  2. Step 2: Convert to fraction form
    51,842.50/80,428 = 80,428/x
  3. Step 3: Cross multiply
    51,842.50x = 80,428 × 80,428
  4. Step 4: Simplify right side
    51,842.50x = 6,468,663,184
  5. Step 5: Solve for x
    x = 6,468,663,184/51,842.50
  6. Step 6: Final answer
    x = 124,775.29

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.