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Finding the Fourth Proportional to 203,621.34, 305,120.27 and 85,228.22

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Solution

The fourth proportional to 203,621.34, 305,120.27 and 85,228.22 is: 127,711.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,621.34 : 305,120.27 = 85,228.22 : x
  2. Step 2: Convert to fraction form
    203,621.34/305,120.27 = 85,228.22/x
  3. Step 3: Cross multiply
    203,621.34x = 305,120.27 × 85,228.22
  4. Step 4: Simplify right side
    203,621.34x = 26,004,857,498.02
  5. Step 5: Solve for x
    x = 26,004,857,498.02/203,621.34
  6. Step 6: Final answer
    x = 127,711.85

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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.