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Finding the Fourth Proportional to 211,546.80, 317,311.20 and 71,305.20

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Solution

The fourth proportional to 211,546.80, 317,311.20 and 71,305.20 is: 106,954.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,546.80 : 317,311.20 = 71,305.20 : x
  2. Step 2: Convert to fraction form
    211,546.80/317,311.20 = 71,305.20/x
  3. Step 3: Cross multiply
    211,546.80x = 317,311.20 × 71,305.20
  4. Step 4: Simplify right side
    211,546.80x = 22,625,938,578.24
  5. Step 5: Solve for x
    x = 22,625,938,578.24/211,546.80
  6. Step 6: Final answer
    x = 106,954.77

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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.