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Finding the Fourth Proportional to 117,721.20, 176,581.80 and 104,890.80

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Solution

The fourth proportional to 117,721.20, 176,581.80 and 104,890.80 is: 157,336.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,721.20 : 176,581.80 = 104,890.80 : x
  2. Step 2: Convert to fraction form
    117,721.20/176,581.80 = 104,890.80/x
  3. Step 3: Cross multiply
    117,721.20x = 176,581.80 × 104,890.80
  4. Step 4: Simplify right side
    117,721.20x = 18,521,806,267.44
  5. Step 5: Solve for x
    x = 18,521,806,267.44/117,721.20
  6. Step 6: Final answer
    x = 157,336.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.