Home / 205,841.20-308,761.80-121,641.70

Finding the Fourth Proportional to 205,841.20, 308,761.80 and 121,641.70

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Solution

The fourth proportional to 205,841.20, 308,761.80 and 121,641.70 is: 182,462.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,841.20 : 308,761.80 = 121,641.70 : x
  2. Step 2: Convert to fraction form
    205,841.20/308,761.80 = 121,641.70/x
  3. Step 3: Cross multiply
    205,841.20x = 308,761.80 × 121,641.70
  4. Step 4: Simplify right side
    205,841.20x = 37,558,310,247.06
  5. Step 5: Solve for x
    x = 37,558,310,247.06/205,841.20
  6. Step 6: Final answer
    x = 182,462.55

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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.