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Finding the Fourth Proportional to 354,021.91, 530,959.05 and 129,488.09

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Solution

The fourth proportional to 354,021.91, 530,959.05 and 129,488.09 is: 194,205.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,021.91 : 530,959.05 = 129,488.09 : x
  2. Step 2: Convert to fraction form
    354,021.91/530,959.05 = 129,488.09/x
  3. Step 3: Cross multiply
    354,021.91x = 530,959.05 × 129,488.09
  4. Step 4: Simplify right side
    354,021.91x = 68,752,870,597.92
  5. Step 5: Solve for x
    x = 68,752,870,597.92/354,021.91
  6. Step 6: Final answer
    x = 194,205.13

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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.