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Finding the Fourth Proportional to 71,656.43, 107,500.11 and 21,740.55

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Solution

The fourth proportional to 71,656.43, 107,500.11 and 21,740.55 is: 32,615.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,656.43 : 107,500.11 = 21,740.55 : x
  2. Step 2: Convert to fraction form
    71,656.43/107,500.11 = 21,740.55/x
  3. Step 3: Cross multiply
    71,656.43x = 107,500.11 × 21,740.55
  4. Step 4: Simplify right side
    71,656.43x = 2,337,110,870.26
  5. Step 5: Solve for x
    x = 2,337,110,870.26/71,656.43
  6. Step 6: Final answer
    x = 32,615.51

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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.