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Finding the Fourth Proportional to 354,668.10, 531,844.65 and 129,969.78

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Solution

The fourth proportional to 354,668.10, 531,844.65 and 129,969.78 is: 194,896.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,668.10 : 531,844.65 = 129,969.78 : x
  2. Step 2: Convert to fraction form
    354,668.10/531,844.65 = 129,969.78/x
  3. Step 3: Cross multiply
    354,668.10x = 531,844.65 × 129,969.78
  4. Step 4: Simplify right side
    354,668.10x = 69,123,732,154.68
  5. Step 5: Solve for x
    x = 69,123,732,154.68/354,668.10
  6. Step 6: Final answer
    x = 194,896.95

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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.