Home / 259,629.80-389,415.90-72,660.20

Finding the Fourth Proportional to 259,629.80, 389,415.90 and 72,660.20

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Solution

The fourth proportional to 259,629.80, 389,415.90 and 72,660.20 is: 108,982.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,629.80 : 389,415.90 = 72,660.20 : x
  2. Step 2: Convert to fraction form
    259,629.80/389,415.90 = 72,660.20/x
  3. Step 3: Cross multiply
    259,629.80x = 389,415.90 × 72,660.20
  4. Step 4: Simplify right side
    259,629.80x = 28,295,037,177.18
  5. Step 5: Solve for x
    x = 28,295,037,177.18/259,629.80
  6. Step 6: Final answer
    x = 108,982.24

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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.