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Finding the Fourth Proportional to 111,808.71, 167,790.83 and 72,267.75

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Solution

The fourth proportional to 111,808.71, 167,790.83 and 72,267.75 is: 108,451.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,808.71 : 167,790.83 = 72,267.75 : x
  2. Step 2: Convert to fraction form
    111,808.71/167,790.83 = 72,267.75/x
  3. Step 3: Cross multiply
    111,808.71x = 167,790.83 × 72,267.75
  4. Step 4: Simplify right side
    111,808.71x = 12,125,865,393.39
  5. Step 5: Solve for x
    x = 12,125,865,393.39/111,808.71
  6. Step 6: Final answer
    x = 108,451.89

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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.