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Finding the Fourth Proportional to 279,145.22, 418,654.92 and 79,461.18

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Solution

The fourth proportional to 279,145.22, 418,654.92 and 79,461.18 is: 119,173.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,145.22 : 418,654.92 = 79,461.18 : x
  2. Step 2: Convert to fraction form
    279,145.22/418,654.92 = 79,461.18/x
  3. Step 3: Cross multiply
    279,145.22x = 418,654.92 × 79,461.18
  4. Step 4: Simplify right side
    279,145.22x = 33,266,813,956.01
  5. Step 5: Solve for x
    x = 33,266,813,956.01/279,145.22
  6. Step 6: Final answer
    x = 119,173.86

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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.