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Finding the Fourth Proportional to 90,376.44, 135,557.10 and 28,041

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Solution

The fourth proportional to 90,376.44, 135,557.10 and 28,041 is: 42,059.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,376.44 : 135,557.10 = 28,041 : x
  2. Step 2: Convert to fraction form
    90,376.44/135,557.10 = 28,041/x
  3. Step 3: Cross multiply
    90,376.44x = 135,557.10 × 28,041
  4. Step 4: Simplify right side
    90,376.44x = 3,801,156,641.10
  5. Step 5: Solve for x
    x = 3,801,156,641.10/90,376.44
  6. Step 6: Final answer
    x = 42,059.15

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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.