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Finding the Fourth Proportional to 171,391.61, 236,463.17 and 99,756.43

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Solution

The fourth proportional to 171,391.61, 236,463.17 and 99,756.43 is: 137,630.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,391.61 : 236,463.17 = 99,756.43 : x
  2. Step 2: Convert to fraction form
    171,391.61/236,463.17 = 99,756.43/x
  3. Step 3: Cross multiply
    171,391.61x = 236,463.17 × 99,756.43
  4. Step 4: Simplify right side
    171,391.61x = 23,588,720,575.74
  5. Step 5: Solve for x
    x = 23,588,720,575.74/171,391.61
  6. Step 6: Final answer
    x = 137,630.54

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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.