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Finding the Fourth Proportional to 79,121.90, 118,684.05 and 25,813.64

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Solution

The fourth proportional to 79,121.90, 118,684.05 and 25,813.64 is: 38,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,121.90 : 118,684.05 = 25,813.64 : x
  2. Step 2: Convert to fraction form
    79,121.90/118,684.05 = 25,813.64/x
  3. Step 3: Cross multiply
    79,121.90x = 118,684.05 × 25,813.64
  4. Step 4: Simplify right side
    79,121.90x = 3,063,667,340.44
  5. Step 5: Solve for x
    x = 3,063,667,340.44/79,121.90
  6. Step 6: Final answer
    x = 38,720.85

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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.