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Finding the Fourth Proportional to 248,717.34, 343,229.94 and 135,540

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Solution

The fourth proportional to 248,717.34, 343,229.94 and 135,540 is: 187,045.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,717.34 : 343,229.94 = 135,540 : x
  2. Step 2: Convert to fraction form
    248,717.34/343,229.94 = 135,540/x
  3. Step 3: Cross multiply
    248,717.34x = 343,229.94 × 135,540
  4. Step 4: Simplify right side
    248,717.34x = 46,521,386,067.60
  5. Step 5: Solve for x
    x = 46,521,386,067.60/248,717.34
  6. Step 6: Final answer
    x = 187,045.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.