Home / 81,713.91-122,586.30-28,403.85

Finding the Fourth Proportional to 81,713.91, 122,586.30 and 28,403.85

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Solution

The fourth proportional to 81,713.91, 122,586.30 and 28,403.85 is: 42,611.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,713.91 : 122,586.30 = 28,403.85 : x
  2. Step 2: Convert to fraction form
    81,713.91/122,586.30 = 28,403.85/x
  3. Step 3: Cross multiply
    81,713.91x = 122,586.30 × 28,403.85
  4. Step 4: Simplify right side
    81,713.91x = 3,481,922,877.26
  5. Step 5: Solve for x
    x = 3,481,922,877.26/81,713.91
  6. Step 6: Final answer
    x = 42,611.14

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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.