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Finding the Fourth Proportional to 221,169.88, 331,743.30 and 71,407.36

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Solution

The fourth proportional to 221,169.88, 331,743.30 and 71,407.36 is: 107,107.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,169.88 : 331,743.30 = 71,407.36 : x
  2. Step 2: Convert to fraction form
    221,169.88/331,743.30 = 71,407.36/x
  3. Step 3: Cross multiply
    221,169.88x = 331,743.30 × 71,407.36
  4. Step 4: Simplify right side
    221,169.88x = 23,688,913,250.69
  5. Step 5: Solve for x
    x = 23,688,913,250.69/221,169.88
  6. Step 6: Final answer
    x = 107,107.32

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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.