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Finding the Fourth Proportional to 78,799.50, 118,198.98 and 19,635.21

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Solution

The fourth proportional to 78,799.50, 118,198.98 and 19,635.21 is: 29,452.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,799.50 : 118,198.98 = 19,635.21 : x
  2. Step 2: Convert to fraction form
    78,799.50/118,198.98 = 19,635.21/x
  3. Step 3: Cross multiply
    78,799.50x = 118,198.98 × 19,635.21
  4. Step 4: Simplify right side
    78,799.50x = 2,320,861,794.09
  5. Step 5: Solve for x
    x = 2,320,861,794.09/78,799.50
  6. Step 6: Final answer
    x = 29,452.75

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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.