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Finding the Fourth Proportional to 71,379.80, 107,069.70 and 21,467.60

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Solution

The fourth proportional to 71,379.80, 107,069.70 and 21,467.60 is: 32,201.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,379.80 : 107,069.70 = 21,467.60 : x
  2. Step 2: Convert to fraction form
    71,379.80/107,069.70 = 21,467.60/x
  3. Step 3: Cross multiply
    71,379.80x = 107,069.70 × 21,467.60
  4. Step 4: Simplify right side
    71,379.80x = 2,298,529,491.72
  5. Step 5: Solve for x
    x = 2,298,529,491.72/71,379.80
  6. Step 6: Final answer
    x = 32,201.40

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1.5x scale

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.