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Finding the Fourth Proportional to 188,169.72, 282,106.62 and 128,825.52

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Solution

The fourth proportional to 188,169.72, 282,106.62 and 128,825.52 is: 193,136.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,169.72 : 282,106.62 = 128,825.52 : x
  2. Step 2: Convert to fraction form
    188,169.72/282,106.62 = 128,825.52/x
  3. Step 3: Cross multiply
    188,169.72x = 282,106.62 × 128,825.52
  4. Step 4: Simplify right side
    188,169.72x = 36,342,532,016.94
  5. Step 5: Solve for x
    x = 36,342,532,016.94/188,169.72
  6. Step 6: Final answer
    x = 193,136.98

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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.