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Finding the Fourth Proportional to 111,990.60, 167,876.55 and 100,180.80

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Solution

The fourth proportional to 111,990.60, 167,876.55 and 100,180.80 is: 150,173.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,990.60 : 167,876.55 = 100,180.80 : x
  2. Step 2: Convert to fraction form
    111,990.60/167,876.55 = 100,180.80/x
  3. Step 3: Cross multiply
    111,990.60x = 167,876.55 × 100,180.80
  4. Step 4: Simplify right side
    111,990.60x = 16,818,007,080.24
  5. Step 5: Solve for x
    x = 16,818,007,080.24/111,990.60
  6. Step 6: Final answer
    x = 150,173.38

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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.