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Finding the Fourth Proportional to 221,173.32, 331,749.02 and 80,921

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Solution

The fourth proportional to 221,173.32, 331,749.02 and 80,921 is: 121,377.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,173.32 : 331,749.02 = 80,921 : x
  2. Step 2: Convert to fraction form
    221,173.32/331,749.02 = 80,921/x
  3. Step 3: Cross multiply
    221,173.32x = 331,749.02 × 80,921
  4. Step 4: Simplify right side
    221,173.32x = 26,845,462,447.42
  5. Step 5: Solve for x
    x = 26,845,462,447.42/221,173.32
  6. Step 6: Final answer
    x = 121,377.49

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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.