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Finding the Fourth Proportional to 71,397.72, 107,087.94 and 18,811.26

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Solution

The fourth proportional to 71,397.72, 107,087.94 and 18,811.26 is: 28,214.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,397.72 : 107,087.94 = 18,811.26 : x
  2. Step 2: Convert to fraction form
    71,397.72/107,087.94 = 18,811.26/x
  3. Step 3: Cross multiply
    71,397.72x = 107,087.94 × 18,811.26
  4. Step 4: Simplify right side
    71,397.72x = 2,014,459,082.20
  5. Step 5: Solve for x
    x = 2,014,459,082.20/71,397.72
  6. Step 6: Final answer
    x = 28,214.61

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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.