Home / 261,589.20-392,383.92-121,271.28

Finding the Fourth Proportional to 261,589.20, 392,383.92 and 121,271.28

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Solution

The fourth proportional to 261,589.20, 392,383.92 and 121,271.28 is: 181,906.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,589.20 : 392,383.92 = 121,271.28 : x
  2. Step 2: Convert to fraction form
    261,589.20/392,383.92 = 121,271.28/x
  3. Step 3: Cross multiply
    261,589.20x = 392,383.92 × 121,271.28
  4. Step 4: Simplify right side
    261,589.20x = 47,584,900,229.82
  5. Step 5: Solve for x
    x = 47,584,900,229.82/261,589.20
  6. Step 6: Final answer
    x = 181,906.98

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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.