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Finding the Fourth Proportional to 111,853.78, 167,780.63 and 92,090.79

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Solution

The fourth proportional to 111,853.78, 167,780.63 and 92,090.79 is: 138,136.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,853.78 : 167,780.63 = 92,090.79 : x
  2. Step 2: Convert to fraction form
    111,853.78/167,780.63 = 92,090.79/x
  3. Step 3: Cross multiply
    111,853.78x = 167,780.63 × 92,090.79
  4. Step 4: Simplify right side
    111,853.78x = 15,451,050,993.62
  5. Step 5: Solve for x
    x = 15,451,050,993.62/111,853.78
  6. Step 6: Final answer
    x = 138,136.16

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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.