Home / 77,986.20-116,979.30-68,144.70

Finding the Fourth Proportional to 77,986.20, 116,979.30 and 68,144.70

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Solution

The fourth proportional to 77,986.20, 116,979.30 and 68,144.70 is: 102,217.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,986.20 : 116,979.30 = 68,144.70 : x
  2. Step 2: Convert to fraction form
    77,986.20/116,979.30 = 68,144.70/x
  3. Step 3: Cross multiply
    77,986.20x = 116,979.30 × 68,144.70
  4. Step 4: Simplify right side
    77,986.20x = 7,971,519,304.71
  5. Step 5: Solve for x
    x = 7,971,519,304.71/77,986.20
  6. Step 6: Final answer
    x = 102,217.05

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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.