Home / 66,813.90-100,115.10-54,273.12

Finding the Fourth Proportional to 66,813.90, 100,115.10 and 54,273.12

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Solution

The fourth proportional to 66,813.90, 100,115.10 and 54,273.12 is: 81,323.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,813.90 : 100,115.10 = 54,273.12 : x
  2. Step 2: Convert to fraction form
    66,813.90/100,115.10 = 54,273.12/x
  3. Step 3: Cross multiply
    66,813.90x = 100,115.10 × 54,273.12
  4. Step 4: Simplify right side
    66,813.90x = 5,433,558,836.11
  5. Step 5: Solve for x
    x = 5,433,558,836.11/66,813.90
  6. Step 6: Final answer
    x = 81,323.78

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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.