Home / 80,726.40-121,161.60-47,404.80

Finding the Fourth Proportional to 80,726.40, 121,161.60 and 47,404.80

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Solution

The fourth proportional to 80,726.40, 121,161.60 and 47,404.80 is: 71,149.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,726.40 : 121,161.60 = 47,404.80 : x
  2. Step 2: Convert to fraction form
    80,726.40/121,161.60 = 47,404.80/x
  3. Step 3: Cross multiply
    80,726.40x = 121,161.60 × 47,404.80
  4. Step 4: Simplify right side
    80,726.40x = 5,743,641,415.68
  5. Step 5: Solve for x
    x = 5,743,641,415.68/80,726.40
  6. Step 6: Final answer
    x = 71,149.48

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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.