Home / 205,981.92-309,031.20-121,816.80

Finding the Fourth Proportional to 205,981.92, 309,031.20 and 121,816.80

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Solution

The fourth proportional to 205,981.92, 309,031.20 and 121,816.80 is: 182,759.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,981.92 : 309,031.20 = 121,816.80 : x
  2. Step 2: Convert to fraction form
    205,981.92/309,031.20 = 121,816.80/x
  3. Step 3: Cross multiply
    205,981.92x = 309,031.20 × 121,816.80
  4. Step 4: Simplify right side
    205,981.92x = 37,645,191,884.16
  5. Step 5: Solve for x
    x = 37,645,191,884.16/205,981.92
  6. Step 6: Final answer
    x = 182,759.69

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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.