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Finding the Fourth Proportional to 71,065.85, 106,590.48 and 18,479.43

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Solution

The fourth proportional to 71,065.85, 106,590.48 and 18,479.43 is: 27,716.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,065.85 : 106,590.48 = 18,479.43 : x
  2. Step 2: Convert to fraction form
    71,065.85/106,590.48 = 18,479.43/x
  3. Step 3: Cross multiply
    71,065.85x = 106,590.48 × 18,479.43
  4. Step 4: Simplify right side
    71,065.85x = 1,969,731,313.83
  5. Step 5: Solve for x
    x = 1,969,731,313.83/71,065.85
  6. Step 6: Final answer
    x = 27,716.99

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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.