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Finding the Fourth Proportional to 81,628.56, 112,659.80 and 49,815.95

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Solution

The fourth proportional to 81,628.56, 112,659.80 and 49,815.95 is: 68,753.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,628.56 : 112,659.80 = 49,815.95 : x
  2. Step 2: Convert to fraction form
    81,628.56/112,659.80 = 49,815.95/x
  3. Step 3: Cross multiply
    81,628.56x = 112,659.80 × 49,815.95
  4. Step 4: Simplify right side
    81,628.56x = 5,612,254,151.43
  5. Step 5: Solve for x
    x = 5,612,254,151.43/81,628.56
  6. Step 6: Final answer
    x = 68,753.56

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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.