Home / 204,079.30-306,009.60-85,616.80

Finding the Fourth Proportional to 204,079.30, 306,009.60 and 85,616.80

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Solution

The fourth proportional to 204,079.30, 306,009.60 and 85,616.80 is: 128,379.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,079.30 : 306,009.60 = 85,616.80 : x
  2. Step 2: Convert to fraction form
    204,079.30/306,009.60 = 85,616.80/x
  3. Step 3: Cross multiply
    204,079.30x = 306,009.60 × 85,616.80
  4. Step 4: Simplify right side
    204,079.30x = 26,199,562,721.28
  5. Step 5: Solve for x
    x = 26,199,562,721.28/204,079.30
  6. Step 6: Final answer
    x = 128,379.32

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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.