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Finding the Fourth Proportional to 81,481.60, 112,447.76 and 45,671.84

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Solution

The fourth proportional to 81,481.60, 112,447.76 and 45,671.84 is: 63,028.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,481.60 : 112,447.76 = 45,671.84 : x
  2. Step 2: Convert to fraction form
    81,481.60/112,447.76 = 45,671.84/x
  3. Step 3: Cross multiply
    81,481.60x = 112,447.76 × 45,671.84
  4. Step 4: Simplify right side
    81,481.60x = 5,135,696,103.08
  5. Step 5: Solve for x
    x = 5,135,696,103.08/81,481.60
  6. Step 6: Final answer
    x = 63,028.91

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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.