Home / 268,288.10-402,432.15-81,275.30

Finding the Fourth Proportional to 268,288.10, 402,432.15 and 81,275.30

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Solution

The fourth proportional to 268,288.10, 402,432.15 and 81,275.30 is: 121,912.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,288.10 : 402,432.15 = 81,275.30 : x
  2. Step 2: Convert to fraction form
    268,288.10/402,432.15 = 81,275.30/x
  3. Step 3: Cross multiply
    268,288.10x = 402,432.15 × 81,275.30
  4. Step 4: Simplify right side
    268,288.10x = 32,707,793,720.90
  5. Step 5: Solve for x
    x = 32,707,793,720.90/268,288.10
  6. Step 6: Final answer
    x = 121,912.95

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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.