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Finding the Fourth Proportional to 221,203.40, 331,805.10 and 81,062.60

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Solution

The fourth proportional to 221,203.40, 331,805.10 and 81,062.60 is: 121,593.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,203.40 : 331,805.10 = 81,062.60 : x
  2. Step 2: Convert to fraction form
    221,203.40/331,805.10 = 81,062.60/x
  3. Step 3: Cross multiply
    221,203.40x = 331,805.10 × 81,062.60
  4. Step 4: Simplify right side
    221,203.40x = 26,896,984,099.26
  5. Step 5: Solve for x
    x = 26,896,984,099.26/221,203.40
  6. Step 6: Final answer
    x = 121,593.90

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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.