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Finding the Fourth Proportional to 188,670.78, 260,369.72 and 103,787.83

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Solution

The fourth proportional to 188,670.78, 260,369.72 and 103,787.83 is: 143,229.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,670.78 : 260,369.72 = 103,787.83 : x
  2. Step 2: Convert to fraction form
    188,670.78/260,369.72 = 103,787.83/x
  3. Step 3: Cross multiply
    188,670.78x = 260,369.72 × 103,787.83
  4. Step 4: Simplify right side
    188,670.78x = 27,023,207,717.57
  5. Step 5: Solve for x
    x = 27,023,207,717.57/188,670.78
  6. Step 6: Final answer
    x = 143,229.43

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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.