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Finding the Fourth Proportional to 111,711.60, 167,761.80 and 108,212.40

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Solution

The fourth proportional to 111,711.60, 167,761.80 and 108,212.40 is: 162,506.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,711.60 : 167,761.80 = 108,212.40 : x
  2. Step 2: Convert to fraction form
    111,711.60/167,761.80 = 108,212.40/x
  3. Step 3: Cross multiply
    111,711.60x = 167,761.80 × 108,212.40
  4. Step 4: Simplify right side
    111,711.60x = 18,153,907,006.32
  5. Step 5: Solve for x
    x = 18,153,907,006.32/111,711.60
  6. Step 6: Final answer
    x = 162,506.91

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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.