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Finding the Fourth Proportional to 79,651.35, 119,481.35 and 20,487.51

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Solution

The fourth proportional to 79,651.35, 119,481.35 and 20,487.51 is: 30,732.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,651.35 : 119,481.35 = 20,487.51 : x
  2. Step 2: Convert to fraction form
    79,651.35/119,481.35 = 20,487.51/x
  3. Step 3: Cross multiply
    79,651.35x = 119,481.35 × 20,487.51
  4. Step 4: Simplify right side
    79,651.35x = 2,447,875,250.50
  5. Step 5: Solve for x
    x = 2,447,875,250.50/79,651.35
  6. Step 6: Final answer
    x = 30,732.38

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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.