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Finding the Fourth Proportional to 279,141.73, 418,712.80 and 68,779.67

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Solution

The fourth proportional to 279,141.73, 418,712.80 and 68,779.67 is: 103,169.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,141.73 : 418,712.80 = 68,779.67 : x
  2. Step 2: Convert to fraction form
    279,141.73/418,712.80 = 68,779.67/x
  3. Step 3: Cross multiply
    279,141.73x = 418,712.80 × 68,779.67
  4. Step 4: Simplify right side
    279,141.73x = 28,798,928,208.78
  5. Step 5: Solve for x
    x = 28,798,928,208.78/279,141.73
  6. Step 6: Final answer
    x = 103,169.56

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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.