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Finding the Fourth Proportional to 90,276.80, 135,436.80 and 37,659.20

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Solution

The fourth proportional to 90,276.80, 135,436.80 and 37,659.20 is: 56,497.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,276.80 : 135,436.80 = 37,659.20 : x
  2. Step 2: Convert to fraction form
    90,276.80/135,436.80 = 37,659.20/x
  3. Step 3: Cross multiply
    90,276.80x = 135,436.80 × 37,659.20
  4. Step 4: Simplify right side
    90,276.80x = 5,100,441,538.56
  5. Step 5: Solve for x
    x = 5,100,441,538.56/90,276.80
  6. Step 6: Final answer
    x = 56,497.81

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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.