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Finding the Fourth Proportional to 111,182.67, 166,773.65 and 85,918.86

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Solution

The fourth proportional to 111,182.67, 166,773.65 and 85,918.86 is: 128,878.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,182.67 : 166,773.65 = 85,918.86 : x
  2. Step 2: Convert to fraction form
    111,182.67/166,773.65 = 85,918.86/x
  3. Step 3: Cross multiply
    111,182.67x = 166,773.65 × 85,918.86
  4. Step 4: Simplify right side
    111,182.67x = 14,329,001,456.44
  5. Step 5: Solve for x
    x = 14,329,001,456.44/111,182.67
  6. Step 6: Final answer
    x = 128,878.01

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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.