Home / 81,016.40-121,330.20-39,414.80

Finding the Fourth Proportional to 81,016.40, 121,330.20 and 39,414.80

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Solution

The fourth proportional to 81,016.40, 121,330.20 and 39,414.80 is: 59,027.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,016.40 : 121,330.20 = 39,414.80 : x
  2. Step 2: Convert to fraction form
    81,016.40/121,330.20 = 39,414.80/x
  3. Step 3: Cross multiply
    81,016.40x = 121,330.20 × 39,414.80
  4. Step 4: Simplify right side
    81,016.40x = 4,782,205,566.96
  5. Step 5: Solve for x
    x = 4,782,205,566.96/81,016.40
  6. Step 6: Final answer
    x = 59,027.62

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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.