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Finding the Fourth Proportional to 424,590.20, 636,891.68 and 109,040.12

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Solution

The fourth proportional to 424,590.20, 636,891.68 and 109,040.12 is: 163,561.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,590.20 : 636,891.68 = 109,040.12 : x
  2. Step 2: Convert to fraction form
    424,590.20/636,891.68 = 109,040.12/x
  3. Step 3: Cross multiply
    424,590.20x = 636,891.68 × 109,040.12
  4. Step 4: Simplify right side
    424,590.20x = 69,446,745,214.20
  5. Step 5: Solve for x
    x = 69,446,745,214.20/424,590.20
  6. Step 6: Final answer
    x = 163,561.82

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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.