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Finding the Third Proportional to 39,748 and 53,790

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Solution

The third proportional to 39,748 and 53,790 is: 72,792.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,748 : 53,790 = 53,790 : x
  2. Step 2: Convert to fraction form
    39,748/53,790 = 53,790/x
  3. Step 3: Cross multiply
    39,748x = 53,790 × 53,790
  4. Step 4: Simplify right side
    39,748x = 2,893,364,100
  5. Step 5: Solve for x
    x = 2,893,364,100/39,748
  6. Step 6: Final answer
    x = 72,792.70

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.