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Finding the Fourth Proportional to 203,620.84, 305,119.52 and 85,227.72

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Solution

The fourth proportional to 203,620.84, 305,119.52 and 85,227.72 is: 127,711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,620.84 : 305,119.52 = 85,227.72 : x
  2. Step 2: Convert to fraction form
    203,620.84/305,119.52 = 85,227.72/x
  3. Step 3: Cross multiply
    203,620.84x = 305,119.52 × 85,227.72
  4. Step 4: Simplify right side
    203,620.84x = 26,004,641,017.09
  5. Step 5: Solve for x
    x = 26,004,641,017.09/203,620.84
  6. Step 6: Final answer
    x = 127,711.10

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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.