Home / 268,131.28-402,198.08-90,639.20

Finding the Fourth Proportional to 268,131.28, 402,198.08 and 90,639.20

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Solution

The fourth proportional to 268,131.28, 402,198.08 and 90,639.20 is: 135,959.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,131.28 : 402,198.08 = 90,639.20 : x
  2. Step 2: Convert to fraction form
    268,131.28/402,198.08 = 90,639.20/x
  3. Step 3: Cross multiply
    268,131.28x = 402,198.08 × 90,639.20
  4. Step 4: Simplify right side
    268,131.28x = 36,454,912,212.74
  5. Step 5: Solve for x
    x = 36,454,912,212.74/268,131.28
  6. Step 6: Final answer
    x = 135,959.19

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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.