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Finding the Fourth Proportional to 220,990.60, 331,774.98 and 131,197.24

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Solution

The fourth proportional to 220,990.60, 331,774.98 and 131,197.24 is: 196,967.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,990.60 : 331,774.98 = 131,197.24 : x
  2. Step 2: Convert to fraction form
    220,990.60/331,774.98 = 131,197.24/x
  3. Step 3: Cross multiply
    220,990.60x = 331,774.98 × 131,197.24
  4. Step 4: Simplify right side
    220,990.60x = 43,527,961,677.06
  5. Step 5: Solve for x
    x = 43,527,961,677.06/220,990.60
  6. Step 6: Final answer
    x = 196,967.48

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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.