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Finding the Fourth Proportional to 279,018.72, 418,680 and 121,246.56

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Solution

The fourth proportional to 279,018.72, 418,680 and 121,246.56 is: 181,935.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,018.72 : 418,680 = 121,246.56 : x
  2. Step 2: Convert to fraction form
    279,018.72/418,680 = 121,246.56/x
  3. Step 3: Cross multiply
    279,018.72x = 418,680 × 121,246.56
  4. Step 4: Simplify right side
    279,018.72x = 50,763,509,740.80
  5. Step 5: Solve for x
    x = 50,763,509,740.80/279,018.72
  6. Step 6: Final answer
    x = 181,935.86

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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.