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Finding the Fourth Proportional to 71,910.68, 107,869.74 and 21,998.36

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Solution

The fourth proportional to 71,910.68, 107,869.74 and 21,998.36 is: 32,998.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,910.68 : 107,869.74 = 21,998.36 : x
  2. Step 2: Convert to fraction form
    71,910.68/107,869.74 = 21,998.36/x
  3. Step 3: Cross multiply
    71,910.68x = 107,869.74 × 21,998.36
  4. Step 4: Simplify right side
    71,910.68x = 2,372,957,373.63
  5. Step 5: Solve for x
    x = 2,372,957,373.63/71,910.68
  6. Step 6: Final answer
    x = 32,998.68

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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.