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Finding the Fourth Proportional to 111,401.10, 167,101.65 and 81,876.60

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Solution

The fourth proportional to 111,401.10, 167,101.65 and 81,876.60 is: 122,814.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,401.10 : 167,101.65 = 81,876.60 : x
  2. Step 2: Convert to fraction form
    111,401.10/167,101.65 = 81,876.60/x
  3. Step 3: Cross multiply
    111,401.10x = 167,101.65 × 81,876.60
  4. Step 4: Simplify right side
    111,401.10x = 13,681,714,956.39
  5. Step 5: Solve for x
    x = 13,681,714,956.39/111,401.10
  6. Step 6: Final answer
    x = 122,814.90

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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.