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Finding the Fourth Proportional to 222,486.80, 333,826.20 and 129,072.40

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Solution

The fourth proportional to 222,486.80, 333,826.20 and 129,072.40 is: 193,664.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,486.80 : 333,826.20 = 129,072.40 : x
  2. Step 2: Convert to fraction form
    222,486.80/333,826.20 = 129,072.40/x
  3. Step 3: Cross multiply
    222,486.80x = 333,826.20 × 129,072.40
  4. Step 4: Simplify right side
    222,486.80x = 43,087,748,816.88
  5. Step 5: Solve for x
    x = 43,087,748,816.88/222,486.80
  6. Step 6: Final answer
    x = 193,664.29

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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.