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Finding the Fourth Proportional to 259,620.90, 389,540.70 and 141,377.10

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Solution

The fourth proportional to 259,620.90, 389,540.70 and 141,377.10 is: 212,125.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,620.90 : 389,540.70 = 141,377.10 : x
  2. Step 2: Convert to fraction form
    259,620.90/389,540.70 = 141,377.10/x
  3. Step 3: Cross multiply
    259,620.90x = 389,540.70 × 141,377.10
  4. Step 4: Simplify right side
    259,620.90x = 55,072,134,497.97
  5. Step 5: Solve for x
    x = 55,072,134,497.97/259,620.90
  6. Step 6: Final answer
    x = 212,125.20

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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.