Home / 80,855.04-121,080-51,183.36

Finding the Fourth Proportional to 80,855.04, 121,080 and 51,183.36

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Solution

The fourth proportional to 80,855.04, 121,080 and 51,183.36 is: 76,646.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,855.04 : 121,080 = 51,183.36 : x
  2. Step 2: Convert to fraction form
    80,855.04/121,080 = 51,183.36/x
  3. Step 3: Cross multiply
    80,855.04x = 121,080 × 51,183.36
  4. Step 4: Simplify right side
    80,855.04x = 6,197,281,228.80
  5. Step 5: Solve for x
    x = 6,197,281,228.80/80,855.04
  6. Step 6: Final answer
    x = 76,646.81

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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.