Home / 259,660.20-389,417.40-82,221.60

Finding the Fourth Proportional to 259,660.20, 389,417.40 and 82,221.60

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Solution

The fourth proportional to 259,660.20, 389,417.40 and 82,221.60 is: 123,309.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,660.20 : 389,417.40 = 82,221.60 : x
  2. Step 2: Convert to fraction form
    259,660.20/389,417.40 = 82,221.60/x
  3. Step 3: Cross multiply
    259,660.20x = 389,417.40 × 82,221.60
  4. Step 4: Simplify right side
    259,660.20x = 32,018,521,695.84
  5. Step 5: Solve for x
    x = 32,018,521,695.84/259,660.20
  6. Step 6: Final answer
    x = 123,309.32

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1.5x scale

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.