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Finding the Fourth Proportional to 79,204.99, 118,512.20 and 78,319.21

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Solution

The fourth proportional to 79,204.99, 118,512.20 and 78,319.21 is: 117,186.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,204.99 : 118,512.20 = 78,319.21 : x
  2. Step 2: Convert to fraction form
    79,204.99/118,512.20 = 78,319.21/x
  3. Step 3: Cross multiply
    79,204.99x = 118,512.20 × 78,319.21
  4. Step 4: Simplify right side
    79,204.99x = 9,281,781,487.77
  5. Step 5: Solve for x
    x = 9,281,781,487.77/79,204.99
  6. Step 6: Final answer
    x = 117,186.83

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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.