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Finding the Third Proportional to 15,128 and 34,724

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Solution

The third proportional to 15,128 and 34,724 is: 79,703.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128 : 34,724 = 34,724 : x
  2. Step 2: Convert to fraction form
    15,128/34,724 = 34,724/x
  3. Step 3: Cross multiply
    15,128x = 34,724 × 34,724
  4. Step 4: Simplify right side
    15,128x = 1,205,756,176
  5. Step 5: Solve for x
    x = 1,205,756,176/15,128
  6. Step 6: Final answer
    x = 79,703.61

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Why These Related Problems?

These problems maintain the same ratio (2.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.