Home / 106,578.72-147,131.78-66,305.43

Finding the Fourth Proportional to 106,578.72, 147,131.78 and 66,305.43

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Solution

The fourth proportional to 106,578.72, 147,131.78 and 66,305.43 is: 91,534.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,578.72 : 147,131.78 = 66,305.43 : x
  2. Step 2: Convert to fraction form
    106,578.72/147,131.78 = 66,305.43/x
  3. Step 3: Cross multiply
    106,578.72x = 147,131.78 × 66,305.43
  4. Step 4: Simplify right side
    106,578.72x = 9,755,635,608.04
  5. Step 5: Solve for x
    x = 9,755,635,608.04/106,578.72
  6. Step 6: Final answer
    x = 91,534.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.