Home / 257,569.30-386,390.40-80,057.80

Finding the Fourth Proportional to 257,569.30, 386,390.40 and 80,057.80

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Solution

The fourth proportional to 257,569.30, 386,390.40 and 80,057.80 is: 120,098.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,569.30 : 386,390.40 = 80,057.80 : x
  2. Step 2: Convert to fraction form
    257,569.30/386,390.40 = 80,057.80/x
  3. Step 3: Cross multiply
    257,569.30x = 386,390.40 × 80,057.80
  4. Step 4: Simplify right side
    257,569.30x = 30,933,565,365.12
  5. Step 5: Solve for x
    x = 30,933,565,365.12/257,569.30
  6. Step 6: Final answer
    x = 120,098.03

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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.