Home / 80,981.80-121,415.10-31,042.60

Finding the Fourth Proportional to 80,981.80, 121,415.10 and 31,042.60

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Solution

The fourth proportional to 80,981.80, 121,415.10 and 31,042.60 is: 46,541.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,981.80 : 121,415.10 = 31,042.60 : x
  2. Step 2: Convert to fraction form
    80,981.80/121,415.10 = 31,042.60/x
  3. Step 3: Cross multiply
    80,981.80x = 121,415.10 × 31,042.60
  4. Step 4: Simplify right side
    80,981.80x = 3,769,040,383.26
  5. Step 5: Solve for x
    x = 3,769,040,383.26/80,981.80
  6. Step 6: Final answer
    x = 46,541.82

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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.