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Finding the Fourth Proportional to 111,881.20, 167,821.80 and 107,580.40

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Solution

The fourth proportional to 111,881.20, 167,821.80 and 107,580.40 is: 161,370.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,881.20 : 167,821.80 = 107,580.40 : x
  2. Step 2: Convert to fraction form
    111,881.20/167,821.80 = 107,580.40/x
  3. Step 3: Cross multiply
    111,881.20x = 167,821.80 × 107,580.40
  4. Step 4: Simplify right side
    111,881.20x = 18,054,336,372.72
  5. Step 5: Solve for x
    x = 18,054,336,372.72/111,881.20
  6. Step 6: Final answer
    x = 161,370.60

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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.