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Finding the Fourth Proportional to 203,085, 280,218.42 and 131,455.08

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Solution

The fourth proportional to 203,085, 280,218.42 and 131,455.08 is: 181,382.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,085 : 280,218.42 = 131,455.08 : x
  2. Step 2: Convert to fraction form
    203,085/280,218.42 = 131,455.08/x
  3. Step 3: Cross multiply
    203,085x = 280,218.42 × 131,455.08
  4. Step 4: Simplify right side
    203,085x = 36,836,134,818.57
  5. Step 5: Solve for x
    x = 36,836,134,818.57/203,085
  6. Step 6: Final answer
    x = 181,382.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.