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Finding the Fourth Proportional to 131,769.60, 197,200.80 and 79,216.80

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Solution

The fourth proportional to 131,769.60, 197,200.80 and 79,216.80 is: 118,552.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,769.60 : 197,200.80 = 79,216.80 : x
  2. Step 2: Convert to fraction form
    131,769.60/197,200.80 = 79,216.80/x
  3. Step 3: Cross multiply
    131,769.60x = 197,200.80 × 79,216.80
  4. Step 4: Simplify right side
    131,769.60x = 15,621,616,333.44
  5. Step 5: Solve for x
    x = 15,621,616,333.44/131,769.60
  6. Step 6: Final answer
    x = 118,552.51

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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.