Home / 259,439.10-389,158.65-91,149.45

Finding the Fourth Proportional to 259,439.10, 389,158.65 and 91,149.45

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Solution

The fourth proportional to 259,439.10, 389,158.65 and 91,149.45 is: 136,724.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,439.10 : 389,158.65 = 91,149.45 : x
  2. Step 2: Convert to fraction form
    259,439.10/389,158.65 = 91,149.45/x
  3. Step 3: Cross multiply
    259,439.10x = 389,158.65 × 91,149.45
  4. Step 4: Simplify right side
    259,439.10x = 35,471,596,910.24
  5. Step 5: Solve for x
    x = 35,471,596,910.24/259,439.10
  6. Step 6: Final answer
    x = 136,724.18

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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.