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Finding the Fourth Proportional to 131,794.38, 181,872.30 and 74,436

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Solution

The fourth proportional to 131,794.38, 181,872.30 and 74,436 is: 102,719.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,794.38 : 181,872.30 = 74,436 : x
  2. Step 2: Convert to fraction form
    131,794.38/181,872.30 = 74,436/x
  3. Step 3: Cross multiply
    131,794.38x = 181,872.30 × 74,436
  4. Step 4: Simplify right side
    131,794.38x = 13,537,846,522.80
  5. Step 5: Solve for x
    x = 13,537,846,522.80/131,794.38
  6. Step 6: Final answer
    x = 102,719.45

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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.