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Finding the Fourth Proportional to 203,854.80, 305,672.85 and 85,392.30

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Solution

The fourth proportional to 203,854.80, 305,672.85 and 85,392.30 is: 128,042.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,854.80 : 305,672.85 = 85,392.30 : x
  2. Step 2: Convert to fraction form
    203,854.80/305,672.85 = 85,392.30/x
  3. Step 3: Cross multiply
    203,854.80x = 305,672.85 × 85,392.30
  4. Step 4: Simplify right side
    203,854.80x = 26,102,107,709.06
  5. Step 5: Solve for x
    x = 26,102,107,709.06/203,854.80
  6. Step 6: Final answer
    x = 128,042.64

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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.