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Finding the Fourth Proportional to 73,195.32, 109,715.20 and 28,815.96

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Solution

The fourth proportional to 73,195.32, 109,715.20 and 28,815.96 is: 43,193.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,195.32 : 109,715.20 = 28,815.96 : x
  2. Step 2: Convert to fraction form
    73,195.32/109,715.20 = 28,815.96/x
  3. Step 3: Cross multiply
    73,195.32x = 109,715.20 × 28,815.96
  4. Step 4: Simplify right side
    73,195.32x = 3,161,548,814.59
  5. Step 5: Solve for x
    x = 3,161,548,814.59/73,195.32
  6. Step 6: Final answer
    x = 43,193.32

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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.