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Finding the Fourth Proportional to 81,600.80, 112,608.90 and 45,790.97

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Solution

The fourth proportional to 81,600.80, 112,608.90 and 45,790.97 is: 63,191.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,600.80 : 112,608.90 = 45,790.97 : x
  2. Step 2: Convert to fraction form
    81,600.80/112,608.90 = 45,790.97/x
  3. Step 3: Cross multiply
    81,600.80x = 112,608.90 × 45,790.97
  4. Step 4: Simplify right side
    81,600.80x = 5,156,470,198.59
  5. Step 5: Solve for x
    x = 5,156,470,198.59/81,600.80
  6. Step 6: Final answer
    x = 63,191.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.