Home / 204,078.30-306,008.10-85,615.80

Finding the Fourth Proportional to 204,078.30, 306,008.10 and 85,615.80

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Solution

The fourth proportional to 204,078.30, 306,008.10 and 85,615.80 is: 128,377.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,078.30 : 306,008.10 = 85,615.80 : x
  2. Step 2: Convert to fraction form
    204,078.30/306,008.10 = 85,615.80/x
  3. Step 3: Cross multiply
    204,078.30x = 306,008.10 × 85,615.80
  4. Step 4: Simplify right side
    204,078.30x = 26,199,128,287.98
  5. Step 5: Solve for x
    x = 26,199,128,287.98/204,078.30
  6. Step 6: Final answer
    x = 128,377.83

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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.