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Finding the Fourth Proportional to 71,898.39, 107,847.84 and 21,978.29

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Solution

The fourth proportional to 71,898.39, 107,847.84 and 21,978.29 is: 32,967.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,898.39 : 107,847.84 = 21,978.29 : x
  2. Step 2: Convert to fraction form
    71,898.39/107,847.84 = 21,978.29/x
  3. Step 3: Cross multiply
    71,898.39x = 107,847.84 × 21,978.29
  4. Step 4: Simplify right side
    71,898.39x = 2,370,311,103.39
  5. Step 5: Solve for x
    x = 2,370,311,103.39/71,898.39
  6. Step 6: Final answer
    x = 32,967.51

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1.5x scale

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.