Home / 247,959.20-371,938.80-81,725.60

Finding the Fourth Proportional to 247,959.20, 371,938.80 and 81,725.60

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Solution

The fourth proportional to 247,959.20, 371,938.80 and 81,725.60 is: 122,588.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,959.20 : 371,938.80 = 81,725.60 : x
  2. Step 2: Convert to fraction form
    247,959.20/371,938.80 = 81,725.60/x
  3. Step 3: Cross multiply
    247,959.20x = 371,938.80 × 81,725.60
  4. Step 4: Simplify right side
    247,959.20x = 30,396,921,593.28
  5. Step 5: Solve for x
    x = 30,396,921,593.28/247,959.20
  6. Step 6: Final answer
    x = 122,588.40

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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.