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Finding the Fourth Proportional to 279,063.87, 418,586.31 and 121,292.34

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Solution

The fourth proportional to 279,063.87, 418,586.31 and 121,292.34 is: 181,934.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,063.87 : 418,586.31 = 121,292.34 : x
  2. Step 2: Convert to fraction form
    279,063.87/418,586.31 = 121,292.34/x
  3. Step 3: Cross multiply
    279,063.87x = 418,586.31 × 121,292.34
  4. Step 4: Simplify right side
    279,063.87x = 50,771,313,031.87
  5. Step 5: Solve for x
    x = 50,771,313,031.87/279,063.87
  6. Step 6: Final answer
    x = 181,934.38

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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.