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Finding the Fourth Proportional to 111,939.70, 167,909.55 and 105,373.30

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Solution

The fourth proportional to 111,939.70, 167,909.55 and 105,373.30 is: 158,059.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,939.70 : 167,909.55 = 105,373.30 : x
  2. Step 2: Convert to fraction form
    111,939.70/167,909.55 = 105,373.30/x
  3. Step 3: Cross multiply
    111,939.70x = 167,909.55 × 105,373.30
  4. Step 4: Simplify right side
    111,939.70x = 17,693,183,385.02
  5. Step 5: Solve for x
    x = 17,693,183,385.02/111,939.70
  6. Step 6: Final answer
    x = 158,059.95

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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.