Home / 259,711.20-389,469.60-91,166.40

Finding the Fourth Proportional to 259,711.20, 389,469.60 and 91,166.40

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Solution

The fourth proportional to 259,711.20, 389,469.60 and 91,166.40 is: 136,715.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,711.20 : 389,469.60 = 91,166.40 : x
  2. Step 2: Convert to fraction form
    259,711.20/389,469.60 = 91,166.40/x
  3. Step 3: Cross multiply
    259,711.20x = 389,469.60 × 91,166.40
  4. Step 4: Simplify right side
    259,711.20x = 35,506,541,341.44
  5. Step 5: Solve for x
    x = 35,506,541,341.44/259,711.20
  6. Step 6: Final answer
    x = 136,715.48

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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.