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Finding the Fourth Proportional to 120,987, 166,962.06 and 67,995

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Solution

The fourth proportional to 120,987, 166,962.06 and 67,995 is: 93,833.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,987 : 166,962.06 = 67,995 : x
  2. Step 2: Convert to fraction form
    120,987/166,962.06 = 67,995/x
  3. Step 3: Cross multiply
    120,987x = 166,962.06 × 67,995
  4. Step 4: Simplify right side
    120,987x = 11,352,585,269.70
  5. Step 5: Solve for x
    x = 11,352,585,269.70/120,987
  6. Step 6: Final answer
    x = 93,833.10

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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.