Home / 259,971.78-389,965.61-89,191.10

Finding the Fourth Proportional to 259,971.78, 389,965.61 and 89,191.10

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Solution

The fourth proportional to 259,971.78, 389,965.61 and 89,191.10 is: 133,789.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,971.78 : 389,965.61 = 89,191.10 : x
  2. Step 2: Convert to fraction form
    259,971.78/389,965.61 = 89,191.10/x
  3. Step 3: Cross multiply
    259,971.78x = 389,965.61 × 89,191.10
  4. Step 4: Simplify right side
    259,971.78x = 34,781,459,768.24
  5. Step 5: Solve for x
    x = 34,781,459,768.24/259,971.78
  6. Step 6: Final answer
    x = 133,789.37

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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.