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Finding the Fourth Proportional to 221,314.70, 331,534.65 and 121,295.90

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Solution

The fourth proportional to 221,314.70, 331,534.65 and 121,295.90 is: 181,704.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,314.70 : 331,534.65 = 121,295.90 : x
  2. Step 2: Convert to fraction form
    221,314.70/331,534.65 = 121,295.90/x
  3. Step 3: Cross multiply
    221,314.70x = 331,534.65 × 121,295.90
  4. Step 4: Simplify right side
    221,314.70x = 40,213,793,752.94
  5. Step 5: Solve for x
    x = 40,213,793,752.94/221,314.70
  6. Step 6: Final answer
    x = 181,704.12

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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.