Home / 257,549.76-386,360.28-80,071.20

Finding the Fourth Proportional to 257,549.76, 386,360.28 and 80,071.20

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Solution

The fourth proportional to 257,549.76, 386,360.28 and 80,071.20 is: 120,117.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,549.76 : 386,360.28 = 80,071.20 : x
  2. Step 2: Convert to fraction form
    257,549.76/386,360.28 = 80,071.20/x
  3. Step 3: Cross multiply
    257,549.76x = 386,360.28 × 80,071.20
  4. Step 4: Simplify right side
    257,549.76x = 30,936,331,251.94
  5. Step 5: Solve for x
    x = 30,936,331,251.94/257,549.76
  6. Step 6: Final answer
    x = 120,117.88

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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.