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Finding the Fourth Proportional to 330,123.80, 494,999.81 and 105,431.42

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Solution

The fourth proportional to 330,123.80, 494,999.81 and 105,431.42 is: 158,087.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,123.80 : 494,999.81 = 105,431.42 : x
  2. Step 2: Convert to fraction form
    330,123.80/494,999.81 = 105,431.42/x
  3. Step 3: Cross multiply
    330,123.80x = 494,999.81 × 105,431.42
  4. Step 4: Simplify right side
    330,123.80x = 52,188,533,973.74
  5. Step 5: Solve for x
    x = 52,188,533,973.74/330,123.80
  6. Step 6: Final answer
    x = 158,087.76

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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.