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Finding the Fourth Proportional to 101,188.40, 151,615.11 and 90,757.82

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Solution

The fourth proportional to 101,188.40, 151,615.11 and 90,757.82 is: 135,986.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,188.40 : 151,615.11 = 90,757.82 : x
  2. Step 2: Convert to fraction form
    101,188.40/151,615.11 = 90,757.82/x
  3. Step 3: Cross multiply
    101,188.40x = 151,615.11 × 90,757.82
  4. Step 4: Simplify right side
    101,188.40x = 13,760,256,104.58
  5. Step 5: Solve for x
    x = 13,760,256,104.58/101,188.40
  6. Step 6: Final answer
    x = 135,986.50

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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.