Home / 68,986.45-103,336.17-66,607.21

Finding the Fourth Proportional to 68,986.45, 103,336.17 and 66,607.21

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Solution

The fourth proportional to 68,986.45, 103,336.17 and 66,607.21 is: 99,772.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,986.45 : 103,336.17 = 66,607.21 : x
  2. Step 2: Convert to fraction form
    68,986.45/103,336.17 = 66,607.21/x
  3. Step 3: Cross multiply
    68,986.45x = 103,336.17 × 66,607.21
  4. Step 4: Simplify right side
    68,986.45x = 6,882,933,975.79
  5. Step 5: Solve for x
    x = 6,882,933,975.79/68,986.45
  6. Step 6: Final answer
    x = 99,772.26

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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.