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Finding the Fourth Proportional to 104,709.79, 157,063.97 and 42,379.39

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Solution

The fourth proportional to 104,709.79, 157,063.97 and 42,379.39 is: 63,568.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,709.79 : 157,063.97 = 42,379.39 : x
  2. Step 2: Convert to fraction form
    104,709.79/157,063.97 = 42,379.39/x
  3. Step 3: Cross multiply
    104,709.79x = 157,063.97 × 42,379.39
  4. Step 4: Simplify right side
    104,709.79x = 6,656,275,027.68
  5. Step 5: Solve for x
    x = 6,656,275,027.68/104,709.79
  6. Step 6: Final answer
    x = 63,568.79

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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.