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Finding the Fourth Proportional to 111,958.20, 167,937.30 and 67,721.40

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Solution

The fourth proportional to 111,958.20, 167,937.30 and 67,721.40 is: 101,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,958.20 : 167,937.30 = 67,721.40 : x
  2. Step 2: Convert to fraction form
    111,958.20/167,937.30 = 67,721.40/x
  3. Step 3: Cross multiply
    111,958.20x = 167,937.30 × 67,721.40
  4. Step 4: Simplify right side
    111,958.20x = 11,372,949,068.22
  5. Step 5: Solve for x
    x = 11,372,949,068.22/111,958.20
  6. Step 6: Final answer
    x = 101,582.10

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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.