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Finding the Fourth Proportional to 90,991.88, 125,554.01 and 52,743.96

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Solution

The fourth proportional to 90,991.88, 125,554.01 and 52,743.96 is: 72,778.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,991.88 : 125,554.01 = 52,743.96 : x
  2. Step 2: Convert to fraction form
    90,991.88/125,554.01 = 52,743.96/x
  3. Step 3: Cross multiply
    90,991.88x = 125,554.01 × 52,743.96
  4. Step 4: Simplify right side
    90,991.88x = 6,622,215,813.14
  5. Step 5: Solve for x
    x = 6,622,215,813.14/90,991.88
  6. Step 6: Final answer
    x = 72,778.10

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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.