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Finding the Fourth Proportional to 279,143.22, 418,878.84 and 101,660.88

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Solution

The fourth proportional to 279,143.22, 418,878.84 and 101,660.88 is: 152,551.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,143.22 : 418,878.84 = 101,660.88 : x
  2. Step 2: Convert to fraction form
    279,143.22/418,878.84 = 101,660.88/x
  3. Step 3: Cross multiply
    279,143.22x = 418,878.84 × 101,660.88
  4. Step 4: Simplify right side
    279,143.22x = 42,583,591,487.78
  5. Step 5: Solve for x
    x = 42,583,591,487.78/279,143.22
  6. Step 6: Final answer
    x = 152,551.05

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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.