Home / 220,579.11-304,426.22-129,930.39

Finding the Fourth Proportional to 220,579.11, 304,426.22 and 129,930.39

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Solution

The fourth proportional to 220,579.11, 304,426.22 and 129,930.39 is: 179,319.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,579.11 : 304,426.22 = 129,930.39 : x
  2. Step 2: Convert to fraction form
    220,579.11/304,426.22 = 129,930.39/x
  3. Step 3: Cross multiply
    220,579.11x = 304,426.22 × 129,930.39
  4. Step 4: Simplify right side
    220,579.11x = 39,554,216,841.17
  5. Step 5: Solve for x
    x = 39,554,216,841.17/220,579.11
  6. Step 6: Final answer
    x = 179,319.87

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1.5x scale

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.