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Finding the Fourth Proportional to 279,054.87, 418,572.90 and 121,283.34

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Solution

The fourth proportional to 279,054.87, 418,572.90 and 121,283.34 is: 181,920.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,054.87 : 418,572.90 = 121,283.34 : x
  2. Step 2: Convert to fraction form
    279,054.87/418,572.90 = 121,283.34/x
  3. Step 3: Cross multiply
    279,054.87x = 418,572.90 × 121,283.34
  4. Step 4: Simplify right side
    279,054.87x = 50,765,919,345.49
  5. Step 5: Solve for x
    x = 50,765,919,345.49/279,054.87
  6. Step 6: Final answer
    x = 181,920.92

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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.