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Finding the Fourth Proportional to 81,705.60, 112,757.76 and 45,906.84

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Solution

The fourth proportional to 81,705.60, 112,757.76 and 45,906.84 is: 63,353.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,705.60 : 112,757.76 = 45,906.84 : x
  2. Step 2: Convert to fraction form
    81,705.60/112,757.76 = 45,906.84/x
  3. Step 3: Cross multiply
    81,705.60x = 112,757.76 × 45,906.84
  4. Step 4: Simplify right side
    81,705.60x = 5,176,352,447.08
  5. Step 5: Solve for x
    x = 5,176,352,447.08/81,705.60
  6. Step 6: Final answer
    x = 63,353.70

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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.