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Finding the Fourth Proportional to 73,221.40, 109,832.10 and 43,672.60

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Solution

The fourth proportional to 73,221.40, 109,832.10 and 43,672.60 is: 65,508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,221.40 : 109,832.10 = 43,672.60 : x
  2. Step 2: Convert to fraction form
    73,221.40/109,832.10 = 43,672.60/x
  3. Step 3: Cross multiply
    73,221.40x = 109,832.10 × 43,672.60
  4. Step 4: Simplify right side
    73,221.40x = 4,796,653,370.46
  5. Step 5: Solve for x
    x = 4,796,653,370.46/73,221.40
  6. Step 6: Final answer
    x = 65,508.90

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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.