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Finding the Fourth Proportional to 290,147.25, 435,223.68 and 87,744.96

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Solution

The fourth proportional to 290,147.25, 435,223.68 and 87,744.96 is: 131,618.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,147.25 : 435,223.68 = 87,744.96 : x
  2. Step 2: Convert to fraction form
    290,147.25/435,223.68 = 87,744.96/x
  3. Step 3: Cross multiply
    290,147.25x = 435,223.68 × 87,744.96
  4. Step 4: Simplify right side
    290,147.25x = 38,188,684,392.65
  5. Step 5: Solve for x
    x = 38,188,684,392.65/290,147.25
  6. Step 6: Final answer
    x = 131,618.29

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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.