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Finding the Fourth Proportional to 361,405.80, 541,719.90 and 136,679.40

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Solution

The fourth proportional to 361,405.80, 541,719.90 and 136,679.40 is: 204,872.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,405.80 : 541,719.90 = 136,679.40 : x
  2. Step 2: Convert to fraction form
    361,405.80/541,719.90 = 136,679.40/x
  3. Step 3: Cross multiply
    361,405.80x = 541,719.90 × 136,679.40
  4. Step 4: Simplify right side
    361,405.80x = 74,041,950,900.06
  5. Step 5: Solve for x
    x = 74,041,950,900.06/361,405.80
  6. Step 6: Final answer
    x = 204,872.06

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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.