Home / 278,306.91-417,118.23-128,339.01

Finding the Fourth Proportional to 278,306.91, 417,118.23 and 128,339.01

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Solution

The fourth proportional to 278,306.91, 417,118.23 and 128,339.01 is: 192,350.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,306.91 : 417,118.23 = 128,339.01 : x
  2. Step 2: Convert to fraction form
    278,306.91/417,118.23 = 128,339.01/x
  3. Step 3: Cross multiply
    278,306.91x = 417,118.23 × 128,339.01
  4. Step 4: Simplify right side
    278,306.91x = 53,532,540,691.15
  5. Step 5: Solve for x
    x = 53,532,540,691.15/278,306.91
  6. Step 6: Final answer
    x = 192,350.74

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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.