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Finding the Fourth Proportional to 136,405.68, 188,248.44 and 76,793.52

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Solution

The fourth proportional to 136,405.68, 188,248.44 and 76,793.52 is: 105,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,405.68 : 188,248.44 = 76,793.52 : x
  2. Step 2: Convert to fraction form
    136,405.68/188,248.44 = 76,793.52/x
  3. Step 3: Cross multiply
    136,405.68x = 188,248.44 × 76,793.52
  4. Step 4: Simplify right side
    136,405.68x = 14,456,260,342.11
  5. Step 5: Solve for x
    x = 14,456,260,342.11/136,405.68
  6. Step 6: Final answer
    x = 105,979.90

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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.