Home / 257,515.30-386,309.40-80,003.80

Finding the Fourth Proportional to 257,515.30, 386,309.40 and 80,003.80

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Solution

The fourth proportional to 257,515.30, 386,309.40 and 80,003.80 is: 120,017.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,515.30 : 386,309.40 = 80,003.80 : x
  2. Step 2: Convert to fraction form
    257,515.30/386,309.40 = 80,003.80/x
  3. Step 3: Cross multiply
    257,515.30x = 386,309.40 × 80,003.80
  4. Step 4: Simplify right side
    257,515.30x = 30,906,219,975.72
  5. Step 5: Solve for x
    x = 30,906,219,975.72/257,515.30
  6. Step 6: Final answer
    x = 120,017.02

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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.