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Finding the Fourth Proportional to 221,002.61, 331,443.26 and 61,040.30

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Solution

The fourth proportional to 221,002.61, 331,443.26 and 61,040.30 is: 91,543.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,002.61 : 331,443.26 = 61,040.30 : x
  2. Step 2: Convert to fraction form
    221,002.61/331,443.26 = 61,040.30/x
  3. Step 3: Cross multiply
    221,002.61x = 331,443.26 × 61,040.30
  4. Step 4: Simplify right side
    221,002.61x = 20,231,396,546.78
  5. Step 5: Solve for x
    x = 20,231,396,546.78/221,002.61
  6. Step 6: Final answer
    x = 91,543.70

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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.