Home / 71,969.13-99,321.33-40,137.89

Finding the Fourth Proportional to 71,969.13, 99,321.33 and 40,137.89

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Solution

The fourth proportional to 71,969.13, 99,321.33 and 40,137.89 is: 55,392.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,969.13 : 99,321.33 = 40,137.89 : x
  2. Step 2: Convert to fraction form
    71,969.13/99,321.33 = 40,137.89/x
  3. Step 3: Cross multiply
    71,969.13x = 99,321.33 × 40,137.89
  4. Step 4: Simplify right side
    71,969.13x = 3,986,548,121.59
  5. Step 5: Solve for x
    x = 3,986,548,121.59/71,969.13
  6. Step 6: Final answer
    x = 55,392.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.