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Finding the Fourth Proportional to 69,089.18, 103,633.94 and 19,171.96

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Solution

The fourth proportional to 69,089.18, 103,633.94 and 19,171.96 is: 28,757.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,089.18 : 103,633.94 = 19,171.96 : x
  2. Step 2: Convert to fraction form
    69,089.18/103,633.94 = 19,171.96/x
  3. Step 3: Cross multiply
    69,089.18x = 103,633.94 × 19,171.96
  4. Step 4: Simplify right side
    69,089.18x = 1,986,865,138.29
  5. Step 5: Solve for x
    x = 1,986,865,138.29/69,089.18
  6. Step 6: Final answer
    x = 28,757.98

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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.