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Finding the Third Proportional to 53,438 and 117,540

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Solution

The third proportional to 53,438 and 117,540 is: 258,536.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,438 : 117,540 = 117,540 : x
  2. Step 2: Convert to fraction form
    53,438/117,540 = 117,540/x
  3. Step 3: Cross multiply
    53,438x = 117,540 × 117,540
  4. Step 4: Simplify right side
    53,438x = 13,815,651,600
  5. Step 5: Solve for x
    x = 13,815,651,600/53,438
  6. Step 6: Final answer
    x = 258,536.09

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.