Home / 80,851.20-121,276.80-52,857.60

Finding the Fourth Proportional to 80,851.20, 121,276.80 and 52,857.60

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Solution

The fourth proportional to 80,851.20, 121,276.80 and 52,857.60 is: 79,286.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,851.20 : 121,276.80 = 52,857.60 : x
  2. Step 2: Convert to fraction form
    80,851.20/121,276.80 = 52,857.60/x
  3. Step 3: Cross multiply
    80,851.20x = 121,276.80 × 52,857.60
  4. Step 4: Simplify right side
    80,851.20x = 6,410,400,583.68
  5. Step 5: Solve for x
    x = 6,410,400,583.68/80,851.20
  6. Step 6: Final answer
    x = 79,286.40

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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.