Home / 259,760.20-389,543.10-91,215.40

Finding the Fourth Proportional to 259,760.20, 389,543.10 and 91,215.40

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Solution

The fourth proportional to 259,760.20, 389,543.10 and 91,215.40 is: 136,788.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,760.20 : 389,543.10 = 91,215.40 : x
  2. Step 2: Convert to fraction form
    259,760.20/389,543.10 = 91,215.40/x
  3. Step 3: Cross multiply
    259,760.20x = 389,543.10 × 91,215.40
  4. Step 4: Simplify right side
    259,760.20x = 35,532,329,683.74
  5. Step 5: Solve for x
    x = 35,532,329,683.74/259,760.20
  6. Step 6: Final answer
    x = 136,788.97

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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.