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Finding the Fourth Proportional to 73,155.72, 109,733.60 and 20,565.22

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Solution

The fourth proportional to 73,155.72, 109,733.60 and 20,565.22 is: 30,847.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,155.72 : 109,733.60 = 20,565.22 : x
  2. Step 2: Convert to fraction form
    73,155.72/109,733.60 = 20,565.22/x
  3. Step 3: Cross multiply
    73,155.72x = 109,733.60 × 20,565.22
  4. Step 4: Simplify right side
    73,155.72x = 2,256,695,522.57
  5. Step 5: Solve for x
    x = 2,256,695,522.57/73,155.72
  6. Step 6: Final answer
    x = 30,847.83

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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.