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Finding the Fourth Proportional to 111,489.30, 167,007.15 and 69,239.70

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Solution

The fourth proportional to 111,489.30, 167,007.15 and 69,239.70 is: 103,718.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,489.30 : 167,007.15 = 69,239.70 : x
  2. Step 2: Convert to fraction form
    111,489.30/167,007.15 = 69,239.70/x
  3. Step 3: Cross multiply
    111,489.30x = 167,007.15 × 69,239.70
  4. Step 4: Simplify right side
    111,489.30x = 11,563,524,963.86
  5. Step 5: Solve for x
    x = 11,563,524,963.86/111,489.30
  6. Step 6: Final answer
    x = 103,718.70

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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.