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Finding the Fourth Proportional to 279,060.40, 418,581.12 and 121,288.84

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Solution

The fourth proportional to 279,060.40, 418,581.12 and 121,288.84 is: 181,929.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,060.40 : 418,581.12 = 121,288.84 : x
  2. Step 2: Convert to fraction form
    279,060.40/418,581.12 = 121,288.84/x
  3. Step 3: Cross multiply
    279,060.40x = 418,581.12 × 121,288.84
  4. Step 4: Simplify right side
    279,060.40x = 50,769,218,490.70
  5. Step 5: Solve for x
    x = 50,769,218,490.70/279,060.40
  6. Step 6: Final answer
    x = 181,929.14

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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.