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Finding the Fourth Proportional to 81,790.36, 112,874.70 and 45,991.60

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Solution

The fourth proportional to 81,790.36, 112,874.70 and 45,991.60 is: 63,470.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,790.36 : 112,874.70 = 45,991.60 : x
  2. Step 2: Convert to fraction form
    81,790.36/112,874.70 = 45,991.60/x
  3. Step 3: Cross multiply
    81,790.36x = 112,874.70 × 45,991.60
  4. Step 4: Simplify right side
    81,790.36x = 5,191,288,052.52
  5. Step 5: Solve for x
    x = 5,191,288,052.52/81,790.36
  6. Step 6: Final answer
    x = 63,470.66

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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.