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Finding the Fourth Proportional to 71,742.80, 107,617.40 and 27,390.80

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Solution

The fourth proportional to 71,742.80, 107,617.40 and 27,390.80 is: 41,087.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,742.80 : 107,617.40 = 27,390.80 : x
  2. Step 2: Convert to fraction form
    71,742.80/107,617.40 = 27,390.80/x
  3. Step 3: Cross multiply
    71,742.80x = 107,617.40 × 27,390.80
  4. Step 4: Simplify right side
    71,742.80x = 2,947,726,679.92
  5. Step 5: Solve for x
    x = 2,947,726,679.92/71,742.80
  6. Step 6: Final answer
    x = 41,087.42

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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.