Home / 257,949.04-386,871.72-80,427.28

Finding the Fourth Proportional to 257,949.04, 386,871.72 and 80,427.28

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Solution

The fourth proportional to 257,949.04, 386,871.72 and 80,427.28 is: 120,624.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,949.04 : 386,871.72 = 80,427.28 : x
  2. Step 2: Convert to fraction form
    257,949.04/386,871.72 = 80,427.28/x
  3. Step 3: Cross multiply
    257,949.04x = 386,871.72 × 80,427.28
  4. Step 4: Simplify right side
    257,949.04x = 31,115,040,148.52
  5. Step 5: Solve for x
    x = 31,115,040,148.52/257,949.04
  6. Step 6: Final answer
    x = 120,624.76

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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.