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Finding the Fourth Proportional to 163,411.85, 225,508.47 and 91,791.92

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Solution

The fourth proportional to 163,411.85, 225,508.47 and 91,791.92 is: 126,672.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,411.85 : 225,508.47 = 91,791.92 : x
  2. Step 2: Convert to fraction form
    163,411.85/225,508.47 = 91,791.92/x
  3. Step 3: Cross multiply
    163,411.85x = 225,508.47 × 91,791.92
  4. Step 4: Simplify right side
    163,411.85x = 20,699,855,437.56
  5. Step 5: Solve for x
    x = 20,699,855,437.56/163,411.85
  6. Step 6: Final answer
    x = 126,672.92

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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.