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Finding the Fourth Proportional to 279,421.92, 419,128.74 and 69,059.79

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Solution

The fourth proportional to 279,421.92, 419,128.74 and 69,059.79 is: 103,588.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,421.92 : 419,128.74 = 69,059.79 : x
  2. Step 2: Convert to fraction form
    279,421.92/419,128.74 = 69,059.79/x
  3. Step 3: Cross multiply
    279,421.92x = 419,128.74 × 69,059.79
  4. Step 4: Simplify right side
    279,421.92x = 28,944,942,767.36
  5. Step 5: Solve for x
    x = 28,944,942,767.36/279,421.92
  6. Step 6: Final answer
    x = 103,588.66

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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.