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Finding the Fourth Proportional to 204,175.80, 306,312.30 and 85,786.20

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Solution

The fourth proportional to 204,175.80, 306,312.30 and 85,786.20 is: 128,699.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,175.80 : 306,312.30 = 85,786.20 : x
  2. Step 2: Convert to fraction form
    204,175.80/306,312.30 = 85,786.20/x
  3. Step 3: Cross multiply
    204,175.80x = 306,312.30 × 85,786.20
  4. Step 4: Simplify right side
    204,175.80x = 26,277,368,230.26
  5. Step 5: Solve for x
    x = 26,277,368,230.26/204,175.80
  6. Step 6: Final answer
    x = 128,699.72

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1.5x scale

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.