Home / 80,815.80-121,166.10-30,876.60

Finding the Fourth Proportional to 80,815.80, 121,166.10 and 30,876.60

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Solution

The fourth proportional to 80,815.80, 121,166.10 and 30,876.60 is: 46,292.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,815.80 : 121,166.10 = 30,876.60 : x
  2. Step 2: Convert to fraction form
    80,815.80/121,166.10 = 30,876.60/x
  3. Step 3: Cross multiply
    80,815.80x = 121,166.10 × 30,876.60
  4. Step 4: Simplify right side
    80,815.80x = 3,741,197,203.26
  5. Step 5: Solve for x
    x = 3,741,197,203.26/80,815.80
  6. Step 6: Final answer
    x = 46,292.89

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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.