Home / 81,086.40-121,701.60-47,764.80

Finding the Fourth Proportional to 81,086.40, 121,701.60 and 47,764.80

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Solution

The fourth proportional to 81,086.40, 121,701.60 and 47,764.80 is: 71,689.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,086.40 : 121,701.60 = 47,764.80 : x
  2. Step 2: Convert to fraction form
    81,086.40/121,701.60 = 47,764.80/x
  3. Step 3: Cross multiply
    81,086.40x = 121,701.60 × 47,764.80
  4. Step 4: Simplify right side
    81,086.40x = 5,813,052,583.68
  5. Step 5: Solve for x
    x = 5,813,052,583.68/81,086.40
  6. Step 6: Final answer
    x = 71,689.61

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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.