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Finding the Fourth Proportional to 203,976.30, 306,073.80 and 85,659.60

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Solution

The fourth proportional to 203,976.30, 306,073.80 and 85,659.60 is: 128,535.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,976.30 : 306,073.80 = 85,659.60 : x
  2. Step 2: Convert to fraction form
    203,976.30/306,073.80 = 85,659.60/x
  3. Step 3: Cross multiply
    203,976.30x = 306,073.80 × 85,659.60
  4. Step 4: Simplify right side
    203,976.30x = 26,218,159,278.48
  5. Step 5: Solve for x
    x = 26,218,159,278.48/203,976.30
  6. Step 6: Final answer
    x = 128,535.32

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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.