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Finding the Fourth Proportional to 111,807.40, 167,788.86 and 72,266.44

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Solution

The fourth proportional to 111,807.40, 167,788.86 and 72,266.44 is: 108,449.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,807.40 : 167,788.86 = 72,266.44 : x
  2. Step 2: Convert to fraction form
    111,807.40/167,788.86 = 72,266.44/x
  3. Step 3: Cross multiply
    111,807.40x = 167,788.86 × 72,266.44
  4. Step 4: Simplify right side
    111,807.40x = 12,125,503,164.39
  5. Step 5: Solve for x
    x = 12,125,503,164.39/111,807.40
  6. Step 6: Final answer
    x = 108,449.92

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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.