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Finding the Fourth Proportional to 279,046.88, 418,560.92 and 121,275.34

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Solution

The fourth proportional to 279,046.88, 418,560.92 and 121,275.34 is: 181,908.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,046.88 : 418,560.92 = 121,275.34 : x
  2. Step 2: Convert to fraction form
    279,046.88/418,560.92 = 121,275.34/x
  3. Step 3: Cross multiply
    279,046.88x = 418,560.92 × 121,275.34
  4. Step 4: Simplify right side
    279,046.88x = 50,761,117,883.71
  5. Step 5: Solve for x
    x = 50,761,117,883.71/279,046.88
  6. Step 6: Final answer
    x = 181,908.92

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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.