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Finding the Fourth Proportional to 81,080.80, 121,621.20 and 36,706.57

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Solution

The fourth proportional to 81,080.80, 121,621.20 and 36,706.57 is: 55,059.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,080.80 : 121,621.20 = 36,706.57 : x
  2. Step 2: Convert to fraction form
    81,080.80/121,621.20 = 36,706.57/x
  3. Step 3: Cross multiply
    81,080.80x = 121,621.20 × 36,706.57
  4. Step 4: Simplify right side
    81,080.80x = 4,464,296,649.58
  5. Step 5: Solve for x
    x = 4,464,296,649.58/81,080.80
  6. Step 6: Final answer
    x = 55,059.85

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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.