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Finding the Fourth Proportional to 211,375.40, 317,106.30 and 71,148.20

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Solution

The fourth proportional to 211,375.40, 317,106.30 and 71,148.20 is: 106,736.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,375.40 : 317,106.30 = 71,148.20 : x
  2. Step 2: Convert to fraction form
    211,375.40/317,106.30 = 71,148.20/x
  3. Step 3: Cross multiply
    211,375.40x = 317,106.30 × 71,148.20
  4. Step 4: Simplify right side
    211,375.40x = 22,561,542,453.66
  5. Step 5: Solve for x
    x = 22,561,542,453.66/211,375.40
  6. Step 6: Final answer
    x = 106,736.84

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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.