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Finding the Fourth Proportional to 279,115.56, 418,483.88 and 142,001.68

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Solution

The fourth proportional to 279,115.56, 418,483.88 and 142,001.68 is: 212,906.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,115.56 : 418,483.88 = 142,001.68 : x
  2. Step 2: Convert to fraction form
    279,115.56/418,483.88 = 142,001.68/x
  3. Step 3: Cross multiply
    279,115.56x = 418,483.88 × 142,001.68
  4. Step 4: Simplify right side
    279,115.56x = 59,425,414,012.92
  5. Step 5: Solve for x
    x = 59,425,414,012.92/279,115.56
  6. Step 6: Final answer
    x = 212,906.13

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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.