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Finding the Fourth Proportional to 317,744.55, 476,616.49 and 81,087.21

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Solution

The fourth proportional to 317,744.55, 476,616.49 and 81,087.21 is: 121,630.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,744.55 : 476,616.49 = 81,087.21 : x
  2. Step 2: Convert to fraction form
    317,744.55/476,616.49 = 81,087.21/x
  3. Step 3: Cross multiply
    317,744.55x = 476,616.49 × 81,087.21
  4. Step 4: Simplify right side
    317,744.55x = 38,647,501,211.37
  5. Step 5: Solve for x
    x = 38,647,501,211.37/317,744.55
  6. Step 6: Final answer
    x = 121,630.73

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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.