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Finding the Fourth Proportional to 112,695.52, 168,959.44 and 68,311.56

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Solution

The fourth proportional to 112,695.52, 168,959.44 and 68,311.56 is: 102,416.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,695.52 : 168,959.44 = 68,311.56 : x
  2. Step 2: Convert to fraction form
    112,695.52/168,959.44 = 68,311.56/x
  3. Step 3: Cross multiply
    112,695.52x = 168,959.44 × 68,311.56
  4. Step 4: Simplify right side
    112,695.52x = 11,541,882,923.13
  5. Step 5: Solve for x
    x = 11,541,882,923.13/112,695.52
  6. Step 6: Final answer
    x = 102,416.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.