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Finding the Fourth Proportional to 217,412.90, 325,860.15 and 91,052.90

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Solution

The fourth proportional to 217,412.90, 325,860.15 and 91,052.90 is: 136,470.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,412.90 : 325,860.15 = 91,052.90 : x
  2. Step 2: Convert to fraction form
    217,412.90/325,860.15 = 91,052.90/x
  3. Step 3: Cross multiply
    217,412.90x = 325,860.15 × 91,052.90
  4. Step 4: Simplify right side
    217,412.90x = 29,670,511,651.94
  5. Step 5: Solve for x
    x = 29,670,511,651.94/217,412.90
  6. Step 6: Final answer
    x = 136,470.80

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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.