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Finding the Fourth Proportional to 204,008.80, 306,013.20 and 85,813.60

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Solution

The fourth proportional to 204,008.80, 306,013.20 and 85,813.60 is: 128,720.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,008.80 : 306,013.20 = 85,813.60 : x
  2. Step 2: Convert to fraction form
    204,008.80/306,013.20 = 85,813.60/x
  3. Step 3: Cross multiply
    204,008.80x = 306,013.20 × 85,813.60
  4. Step 4: Simplify right side
    204,008.80x = 26,260,094,339.52
  5. Step 5: Solve for x
    x = 26,260,094,339.52/204,008.80
  6. Step 6: Final answer
    x = 128,720.40

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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.