Home / 205,836.40-308,623.20-87,446.80

Finding the Fourth Proportional to 205,836.40, 308,623.20 and 87,446.80

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Solution

The fourth proportional to 205,836.40, 308,623.20 and 87,446.80 is: 131,114.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,836.40 : 308,623.20 = 87,446.80 : x
  2. Step 2: Convert to fraction form
    205,836.40/308,623.20 = 87,446.80/x
  3. Step 3: Cross multiply
    205,836.40x = 308,623.20 × 87,446.80
  4. Step 4: Simplify right side
    205,836.40x = 26,988,111,245.76
  5. Step 5: Solve for x
    x = 26,988,111,245.76/205,836.40
  6. Step 6: Final answer
    x = 131,114.38

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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.