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Finding the Fourth Proportional to 222,479.80, 333,815.70 and 129,065.40

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Solution

The fourth proportional to 222,479.80, 333,815.70 and 129,065.40 is: 193,653.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,479.80 : 333,815.70 = 129,065.40 : x
  2. Step 2: Convert to fraction form
    222,479.80/333,815.70 = 129,065.40/x
  3. Step 3: Cross multiply
    222,479.80x = 333,815.70 × 129,065.40
  4. Step 4: Simplify right side
    222,479.80x = 43,084,056,846.78
  5. Step 5: Solve for x
    x = 43,084,056,846.78/222,479.80
  6. Step 6: Final answer
    x = 193,653.79

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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.