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Finding the Fourth Proportional to 90,367, 135,495.80 and 40,437.78

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Solution

The fourth proportional to 90,367, 135,495.80 and 40,437.78 is: 60,632.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,367 : 135,495.80 = 40,437.78 : x
  2. Step 2: Convert to fraction form
    90,367/135,495.80 = 40,437.78/x
  3. Step 3: Cross multiply
    90,367x = 135,495.80 × 40,437.78
  4. Step 4: Simplify right side
    90,367x = 5,479,149,351.32
  5. Step 5: Solve for x
    x = 5,479,149,351.32/90,367
  6. Step 6: Final answer
    x = 60,632.19

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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.