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Finding the Fourth Proportional to 71,728.68, 107,592.84 and 21,808.56

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Solution

The fourth proportional to 71,728.68, 107,592.84 and 21,808.56 is: 32,712.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,728.68 : 107,592.84 = 21,808.56 : x
  2. Step 2: Convert to fraction form
    71,728.68/107,592.84 = 21,808.56/x
  3. Step 3: Cross multiply
    71,728.68x = 107,592.84 × 21,808.56
  4. Step 4: Simplify right side
    71,728.68x = 2,346,444,906.71
  5. Step 5: Solve for x
    x = 2,346,444,906.71/71,728.68
  6. Step 6: Final answer
    x = 32,712.79

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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.