Home / 81,680.67-122,606.87-72,380.25

Finding the Fourth Proportional to 81,680.67, 122,606.87 and 72,380.25

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Solution

The fourth proportional to 81,680.67, 122,606.87 and 72,380.25 is: 108,646.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,680.67 : 122,606.87 = 72,380.25 : x
  2. Step 2: Convert to fraction form
    81,680.67/122,606.87 = 72,380.25/x
  3. Step 3: Cross multiply
    81,680.67x = 122,606.87 × 72,380.25
  4. Step 4: Simplify right side
    81,680.67x = 8,874,315,540.42
  5. Step 5: Solve for x
    x = 8,874,315,540.42/81,680.67
  6. Step 6: Final answer
    x = 108,646.46

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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.