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Finding the Fourth Proportional to 279,289.31, 418,999.57 and 79,612.56

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Solution

The fourth proportional to 279,289.31, 418,999.57 and 79,612.56 is: 119,437.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,289.31 : 418,999.57 = 79,612.56 : x
  2. Step 2: Convert to fraction form
    279,289.31/418,999.57 = 79,612.56/x
  3. Step 3: Cross multiply
    279,289.31x = 418,999.57 × 79,612.56
  4. Step 4: Simplify right side
    279,289.31x = 33,357,628,207.57
  5. Step 5: Solve for x
    x = 33,357,628,207.57/279,289.31
  6. Step 6: Final answer
    x = 119,437.54

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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.