Home / 71,815.61-108,261.21-66,998.75

Finding the Fourth Proportional to 71,815.61, 108,261.21 and 66,998.75

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Solution

The fourth proportional to 71,815.61, 108,261.21 and 66,998.75 is: 100,999.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,815.61 : 108,261.21 = 66,998.75 : x
  2. Step 2: Convert to fraction form
    71,815.61/108,261.21 = 66,998.75/x
  3. Step 3: Cross multiply
    71,815.61x = 108,261.21 × 66,998.75
  4. Step 4: Simplify right side
    71,815.61x = 7,253,365,076.56
  5. Step 5: Solve for x
    x = 7,253,365,076.56/71,815.61
  6. Step 6: Final answer
    x = 100,999.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.