Home / 91,821.20-137,731.80-76,269.20

Finding the Fourth Proportional to 91,821.20, 137,731.80 and 76,269.20

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Solution

The fourth proportional to 91,821.20, 137,731.80 and 76,269.20 is: 114,403.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,821.20 : 137,731.80 = 76,269.20 : x
  2. Step 2: Convert to fraction form
    91,821.20/137,731.80 = 76,269.20/x
  3. Step 3: Cross multiply
    91,821.20x = 137,731.80 × 76,269.20
  4. Step 4: Simplify right side
    91,821.20x = 10,504,694,200.56
  5. Step 5: Solve for x
    x = 10,504,694,200.56/91,821.20
  6. Step 6: Final answer
    x = 114,403.80

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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.