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Finding the Fourth Proportional to 76,367.80, 114,551.70 and 71,993.80

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Solution

The fourth proportional to 76,367.80, 114,551.70 and 71,993.80 is: 107,990.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,367.80 : 114,551.70 = 71,993.80 : x
  2. Step 2: Convert to fraction form
    76,367.80/114,551.70 = 71,993.80/x
  3. Step 3: Cross multiply
    76,367.80x = 114,551.70 × 71,993.80
  4. Step 4: Simplify right side
    76,367.80x = 8,247,012,179.46
  5. Step 5: Solve for x
    x = 8,247,012,179.46/76,367.80
  6. Step 6: Final answer
    x = 107,990.70

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1.5x scale

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.