Home / 57,639.40-86,286.30-54,221.80

Finding the Fourth Proportional to 57,639.40, 86,286.30 and 54,221.80

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Solution

The fourth proportional to 57,639.40, 86,286.30 and 54,221.80 is: 81,170.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,639.40 : 86,286.30 = 54,221.80 : x
  2. Step 2: Convert to fraction form
    57,639.40/86,286.30 = 54,221.80/x
  3. Step 3: Cross multiply
    57,639.40x = 86,286.30 × 54,221.80
  4. Step 4: Simplify right side
    57,639.40x = 4,678,598,501.34
  5. Step 5: Solve for x
    x = 4,678,598,501.34/57,639.40
  6. Step 6: Final answer
    x = 81,170.15

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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.