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Finding the Fourth Proportional to 220,143.80, 329,826.90 and 136,940.60

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Solution

The fourth proportional to 220,143.80, 329,826.90 and 136,940.60 is: 205,169.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,143.80 : 329,826.90 = 136,940.60 : x
  2. Step 2: Convert to fraction form
    220,143.80/329,826.90 = 136,940.60/x
  3. Step 3: Cross multiply
    220,143.80x = 329,826.90 × 136,940.60
  4. Step 4: Simplify right side
    220,143.80x = 45,166,693,582.14
  5. Step 5: Solve for x
    x = 45,166,693,582.14/220,143.80
  6. Step 6: Final answer
    x = 205,169.05

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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.