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Finding the Fourth Proportional to 90,462.56, 124,723.60 and 64,651.96

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Solution

The fourth proportional to 90,462.56, 124,723.60 and 64,651.96 is: 89,137.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,462.56 : 124,723.60 = 64,651.96 : x
  2. Step 2: Convert to fraction form
    90,462.56/124,723.60 = 64,651.96/x
  3. Step 3: Cross multiply
    90,462.56x = 124,723.60 × 64,651.96
  4. Step 4: Simplify right side
    90,462.56x = 8,063,625,198.26
  5. Step 5: Solve for x
    x = 8,063,625,198.26/90,462.56
  6. Step 6: Final answer
    x = 89,137.71

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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.