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Finding the Fourth Proportional to 203,555.15, 280,910.61 and 112,908.16

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Solution

The fourth proportional to 203,555.15, 280,910.61 and 112,908.16 is: 155,815.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,555.15 : 280,910.61 = 112,908.16 : x
  2. Step 2: Convert to fraction form
    203,555.15/280,910.61 = 112,908.16/x
  3. Step 3: Cross multiply
    203,555.15x = 280,910.61 × 112,908.16
  4. Step 4: Simplify right side
    203,555.15x = 31,717,099,817.31
  5. Step 5: Solve for x
    x = 31,717,099,817.31/203,555.15
  6. Step 6: Final answer
    x = 155,815.76

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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.