Home / 257,691.11-386,573.13-80,216.06

Finding the Fourth Proportional to 257,691.11, 386,573.13 and 80,216.06

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Solution

The fourth proportional to 257,691.11, 386,573.13 and 80,216.06 is: 120,335.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,691.11 : 386,573.13 = 80,216.06 : x
  2. Step 2: Convert to fraction form
    257,691.11/386,573.13 = 80,216.06/x
  3. Step 3: Cross multiply
    257,691.11x = 386,573.13 × 80,216.06
  4. Step 4: Simplify right side
    257,691.11x = 31,009,373,390.47
  5. Step 5: Solve for x
    x = 31,009,373,390.47/257,691.11
  6. Step 6: Final answer
    x = 120,335.44

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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.