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Finding the Fourth Proportional to 188,611.20, 282,631.68 and 126,169.92

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Solution

The fourth proportional to 188,611.20, 282,631.68 and 126,169.92 is: 189,064.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,611.20 : 282,631.68 = 126,169.92 : x
  2. Step 2: Convert to fraction form
    188,611.20/282,631.68 = 126,169.92/x
  3. Step 3: Cross multiply
    188,611.20x = 282,631.68 × 126,169.92
  4. Step 4: Simplify right side
    188,611.20x = 35,659,616,455.07
  5. Step 5: Solve for x
    x = 35,659,616,455.07/188,611.20
  6. Step 6: Final answer
    x = 189,064.15

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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.