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Finding the Fourth Proportional to 71,910.86, 107,865.37 and 21,992.58

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Solution

The fourth proportional to 71,910.86, 107,865.37 and 21,992.58 is: 32,988.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,910.86 : 107,865.37 = 21,992.58 : x
  2. Step 2: Convert to fraction form
    71,910.86/107,865.37 = 21,992.58/x
  3. Step 3: Cross multiply
    71,910.86x = 107,865.37 × 21,992.58
  4. Step 4: Simplify right side
    71,910.86x = 2,372,237,806.45
  5. Step 5: Solve for x
    x = 2,372,237,806.45/71,910.86
  6. Step 6: Final answer
    x = 32,988.59

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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.