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Finding the Fourth Proportional to 71,808.80, 107,713.20 and 27,412.70

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Solution

The fourth proportional to 71,808.80, 107,713.20 and 27,412.70 is: 41,119.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,808.80 : 107,713.20 = 27,412.70 : x
  2. Step 2: Convert to fraction form
    71,808.80/107,713.20 = 27,412.70/x
  3. Step 3: Cross multiply
    71,808.80x = 107,713.20 × 27,412.70
  4. Step 4: Simplify right side
    71,808.80x = 2,952,709,637.64
  5. Step 5: Solve for x
    x = 2,952,709,637.64/71,808.80
  6. Step 6: Final answer
    x = 41,119.05

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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.