Home / 209,255.20-313,882.80-138,906.40

Finding the Fourth Proportional to 209,255.20, 313,882.80 and 138,906.40

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Solution

The fourth proportional to 209,255.20, 313,882.80 and 138,906.40 is: 208,359.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,255.20 : 313,882.80 = 138,906.40 : x
  2. Step 2: Convert to fraction form
    209,255.20/313,882.80 = 138,906.40/x
  3. Step 3: Cross multiply
    209,255.20x = 313,882.80 × 138,906.40
  4. Step 4: Simplify right side
    209,255.20x = 43,600,329,769.92
  5. Step 5: Solve for x
    x = 43,600,329,769.92/209,255.20
  6. Step 6: Final answer
    x = 208,359.60

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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.