Home / 109,131.20-163,696.80-72,195.20

Finding the Fourth Proportional to 109,131.20, 163,696.80 and 72,195.20

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Solution

The fourth proportional to 109,131.20, 163,696.80 and 72,195.20 is: 108,292.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,131.20 : 163,696.80 = 72,195.20 : x
  2. Step 2: Convert to fraction form
    109,131.20/163,696.80 = 72,195.20/x
  3. Step 3: Cross multiply
    109,131.20x = 163,696.80 × 72,195.20
  4. Step 4: Simplify right side
    109,131.20x = 11,818,123,215.36
  5. Step 5: Solve for x
    x = 11,818,123,215.36/109,131.20
  6. Step 6: Final answer
    x = 108,292.80

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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.