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Finding the Fourth Proportional to 149,219.85, 205,862.40 and 91,841.85

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Solution

The fourth proportional to 149,219.85, 205,862.40 and 91,841.85 is: 126,704.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,219.85 : 205,862.40 = 91,841.85 : x
  2. Step 2: Convert to fraction form
    149,219.85/205,862.40 = 91,841.85/x
  3. Step 3: Cross multiply
    149,219.85x = 205,862.40 × 91,841.85
  4. Step 4: Simplify right side
    149,219.85x = 18,906,783,661.44
  5. Step 5: Solve for x
    x = 18,906,783,661.44/149,219.85
  6. Step 6: Final answer
    x = 126,704.21

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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.