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Finding the Fourth Proportional to 76,391.91, 114,544.13 and 71,988.75

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Solution

The fourth proportional to 76,391.91, 114,544.13 and 71,988.75 is: 107,941.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,391.91 : 114,544.13 = 71,988.75 : x
  2. Step 2: Convert to fraction form
    76,391.91/114,544.13 = 71,988.75/x
  3. Step 3: Cross multiply
    76,391.91x = 114,544.13 × 71,988.75
  4. Step 4: Simplify right side
    76,391.91x = 8,245,888,378.59
  5. Step 5: Solve for x
    x = 8,245,888,378.59/76,391.91
  6. Step 6: Final answer
    x = 107,941.91

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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.