Home / 81,789.12-122,683.72-25,633.60

Finding the Fourth Proportional to 81,789.12, 122,683.72 and 25,633.60

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Solution

The fourth proportional to 81,789.12, 122,683.72 and 25,633.60 is: 38,450.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,789.12 : 122,683.72 = 25,633.60 : x
  2. Step 2: Convert to fraction form
    81,789.12/122,683.72 = 25,633.60/x
  3. Step 3: Cross multiply
    81,789.12x = 122,683.72 × 25,633.60
  4. Step 4: Simplify right side
    81,789.12x = 3,144,825,404.99
  5. Step 5: Solve for x
    x = 3,144,825,404.99/81,789.12
  6. Step 6: Final answer
    x = 38,450.41

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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.