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Finding the Fourth Proportional to 188,920.89, 283,380.93 and 129,576.65

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Solution

The fourth proportional to 188,920.89, 283,380.93 and 129,576.65 is: 194,364.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,920.89 : 283,380.93 = 129,576.65 : x
  2. Step 2: Convert to fraction form
    188,920.89/283,380.93 = 129,576.65/x
  3. Step 3: Cross multiply
    188,920.89x = 283,380.93 × 129,576.65
  4. Step 4: Simplify right side
    188,920.89x = 36,719,550,166.38
  5. Step 5: Solve for x
    x = 36,719,550,166.38/188,920.89
  6. Step 6: Final answer
    x = 194,364.69

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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.