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Finding the Fourth Proportional to 71,308.44, 106,958.34 and 18,716.76

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Solution

The fourth proportional to 71,308.44, 106,958.34 and 18,716.76 is: 28,074.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,308.44 : 106,958.34 = 18,716.76 : x
  2. Step 2: Convert to fraction form
    71,308.44/106,958.34 = 18,716.76/x
  3. Step 3: Cross multiply
    71,308.44x = 106,958.34 × 18,716.76
  4. Step 4: Simplify right side
    71,308.44x = 2,001,913,579.78
  5. Step 5: Solve for x
    x = 2,001,913,579.78/71,308.44
  6. Step 6: Final answer
    x = 28,074.01

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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.