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Finding the Fourth Proportional to 39,781.60, 59,672.40 and 39,198.40

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Solution

The fourth proportional to 39,781.60, 59,672.40 and 39,198.40 is: 58,797.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.60 : 59,672.40 = 39,198.40 : x
  2. Step 2: Convert to fraction form
    39,781.60/59,672.40 = 39,198.40/x
  3. Step 3: Cross multiply
    39,781.60x = 59,672.40 × 39,198.40
  4. Step 4: Simplify right side
    39,781.60x = 2,339,062,604.16
  5. Step 5: Solve for x
    x = 2,339,062,604.16/39,781.60
  6. Step 6: Final answer
    x = 58,797.60

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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.