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Finding the Fourth Proportional to 73,221.60, 109,853.07 and 20,631.54

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Solution

The fourth proportional to 73,221.60, 109,853.07 and 20,631.54 is: 30,953.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,221.60 : 109,853.07 = 20,631.54 : x
  2. Step 2: Convert to fraction form
    73,221.60/109,853.07 = 20,631.54/x
  3. Step 3: Cross multiply
    73,221.60x = 109,853.07 × 20,631.54
  4. Step 4: Simplify right side
    73,221.60x = 2,266,438,007.83
  5. Step 5: Solve for x
    x = 2,266,438,007.83/73,221.60
  6. Step 6: Final answer
    x = 30,953.13

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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.