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Finding the Fourth Proportional to 136,796.65, 188,774.46 and 85,836.82

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Solution

The fourth proportional to 136,796.65, 188,774.46 and 85,836.82 is: 118,451.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,796.65 : 188,774.46 = 85,836.82 : x
  2. Step 2: Convert to fraction form
    136,796.65/188,774.46 = 85,836.82/x
  3. Step 3: Cross multiply
    136,796.65x = 188,774.46 × 85,836.82
  4. Step 4: Simplify right side
    136,796.65x = 16,203,799,343.62
  5. Step 5: Solve for x
    x = 16,203,799,343.62/136,796.65
  6. Step 6: Final answer
    x = 118,451.73

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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.