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Finding the Fourth Proportional to 111,649.03, 167,099.31 and 91,657.42

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Solution

The fourth proportional to 111,649.03, 167,099.31 and 91,657.42 is: 137,178.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,649.03 : 167,099.31 = 91,657.42 : x
  2. Step 2: Convert to fraction form
    111,649.03/167,099.31 = 91,657.42/x
  3. Step 3: Cross multiply
    111,649.03x = 167,099.31 × 91,657.42
  4. Step 4: Simplify right side
    111,649.03x = 15,315,891,638.38
  5. Step 5: Solve for x
    x = 15,315,891,638.38/111,649.03
  6. Step 6: Final answer
    x = 137,178.90

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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.