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Finding the Fourth Proportional to 163,328.80, 225,379.92 and 91,703.20

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Solution

The fourth proportional to 163,328.80, 225,379.92 and 91,703.20 is: 126,542.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,328.80 : 225,379.92 = 91,703.20 : x
  2. Step 2: Convert to fraction form
    163,328.80/225,379.92 = 91,703.20/x
  3. Step 3: Cross multiply
    163,328.80x = 225,379.92 × 91,703.20
  4. Step 4: Simplify right side
    163,328.80x = 20,668,059,879.74
  5. Step 5: Solve for x
    x = 20,668,059,879.74/163,328.80
  6. Step 6: Final answer
    x = 126,542.65

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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.