Home / 80,816.12-121,163.70-55,784.70

Finding the Fourth Proportional to 80,816.12, 121,163.70 and 55,784.70

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Solution

The fourth proportional to 80,816.12, 121,163.70 and 55,784.70 is: 83,635.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,816.12 : 121,163.70 = 55,784.70 : x
  2. Step 2: Convert to fraction form
    80,816.12/121,163.70 = 55,784.70/x
  3. Step 3: Cross multiply
    80,816.12x = 121,163.70 × 55,784.70
  4. Step 4: Simplify right side
    80,816.12x = 6,759,080,655.39
  5. Step 5: Solve for x
    x = 6,759,080,655.39/80,816.12
  6. Step 6: Final answer
    x = 83,635.30

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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.