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Finding the Fourth Proportional to 221,001.86, 331,442.13 and 61,039.55

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Solution

The fourth proportional to 221,001.86, 331,442.13 and 61,039.55 is: 91,542.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,001.86 : 331,442.13 = 61,039.55 : x
  2. Step 2: Convert to fraction form
    221,001.86/331,442.13 = 61,039.55/x
  3. Step 3: Cross multiply
    221,001.86x = 331,442.13 × 61,039.55
  4. Step 4: Simplify right side
    221,001.86x = 20,231,079,523.75
  5. Step 5: Solve for x
    x = 20,231,079,523.75/221,001.86
  6. Step 6: Final answer
    x = 91,542.57

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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.