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Finding the Fourth Proportional to 120,988, 166,963.44 and 67,996

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Solution

The fourth proportional to 120,988, 166,963.44 and 67,996 is: 93,834.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,988 : 166,963.44 = 67,996 : x
  2. Step 2: Convert to fraction form
    120,988/166,963.44 = 67,996/x
  3. Step 3: Cross multiply
    120,988x = 166,963.44 × 67,996
  4. Step 4: Simplify right side
    120,988x = 11,352,846,066.24
  5. Step 5: Solve for x
    x = 11,352,846,066.24/120,988
  6. Step 6: Final answer
    x = 93,834.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.