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Finding the Fourth Proportional to 221,090.87, 331,636.29 and 54,878.87

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Solution

The fourth proportional to 221,090.87, 331,636.29 and 54,878.87 is: 82,318.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,090.87 : 331,636.29 = 54,878.87 : x
  2. Step 2: Convert to fraction form
    221,090.87/331,636.29 = 54,878.87/x
  3. Step 3: Cross multiply
    221,090.87x = 331,636.29 × 54,878.87
  4. Step 4: Simplify right side
    221,090.87x = 18,199,823,188.01
  5. Step 5: Solve for x
    x = 18,199,823,188.01/221,090.87
  6. Step 6: Final answer
    x = 82,318.30

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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.