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Finding the Fourth Proportional to 71,814.99, 99,106.43 and 39,986.04

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Solution

The fourth proportional to 71,814.99, 99,106.43 and 39,986.04 is: 55,181.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,814.99 : 99,106.43 = 39,986.04 : x
  2. Step 2: Convert to fraction form
    71,814.99/99,106.43 = 39,986.04/x
  3. Step 3: Cross multiply
    71,814.99x = 99,106.43 × 39,986.04
  4. Step 4: Simplify right side
    71,814.99x = 3,962,873,474.31
  5. Step 5: Solve for x
    x = 3,962,873,474.31/71,814.99
  6. Step 6: Final answer
    x = 55,181.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.