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Finding the Fourth Proportional to 203,049.78, 280,205.34 and 112,403.88

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Solution

The fourth proportional to 203,049.78, 280,205.34 and 112,403.88 is: 155,115.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,049.78 : 280,205.34 = 112,403.88 : x
  2. Step 2: Convert to fraction form
    203,049.78/280,205.34 = 112,403.88/x
  3. Step 3: Cross multiply
    203,049.78x = 280,205.34 × 112,403.88
  4. Step 4: Simplify right side
    203,049.78x = 31,496,167,412.72
  5. Step 5: Solve for x
    x = 31,496,167,412.72/203,049.78
  6. Step 6: Final answer
    x = 155,115.50

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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.