Home / 80,771.94-121,379.24-76,186.40

Finding the Fourth Proportional to 80,771.94, 121,379.24 and 76,186.40

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Solution

The fourth proportional to 80,771.94, 121,379.24 and 76,186.40 is: 114,488.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,771.94 : 121,379.24 = 76,186.40 : x
  2. Step 2: Convert to fraction form
    80,771.94/121,379.24 = 76,186.40/x
  3. Step 3: Cross multiply
    80,771.94x = 121,379.24 × 76,186.40
  4. Step 4: Simplify right side
    80,771.94x = 9,247,446,913.91
  5. Step 5: Solve for x
    x = 9,247,446,913.91/80,771.94
  6. Step 6: Final answer
    x = 114,488.36

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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.