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Finding the Fourth Proportional to 91,993.32, 138,033.72 and 52,561.71

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Solution

The fourth proportional to 91,993.32, 138,033.72 and 52,561.71 is: 78,867.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,993.32 : 138,033.72 = 52,561.71 : x
  2. Step 2: Convert to fraction form
    91,993.32/138,033.72 = 52,561.71/x
  3. Step 3: Cross multiply
    91,993.32x = 138,033.72 × 52,561.71
  4. Step 4: Simplify right side
    91,993.32x = 7,255,288,360.86
  5. Step 5: Solve for x
    x = 7,255,288,360.86/91,993.32
  6. Step 6: Final answer
    x = 78,867.56

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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.