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Finding the Fourth Proportional to 110,266.80, 165,072.15 and 72,869.10

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Solution

The fourth proportional to 110,266.80, 165,072.15 and 72,869.10 is: 109,086.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,266.80 : 165,072.15 = 72,869.10 : x
  2. Step 2: Convert to fraction form
    110,266.80/165,072.15 = 72,869.10/x
  3. Step 3: Cross multiply
    110,266.80x = 165,072.15 × 72,869.10
  4. Step 4: Simplify right side
    110,266.80x = 12,028,659,005.57
  5. Step 5: Solve for x
    x = 12,028,659,005.57/110,266.80
  6. Step 6: Final answer
    x = 109,086.86

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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.