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Finding the Fourth Proportional to 120,841.80, 166,788.36 and 67,145.28

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Solution

The fourth proportional to 120,841.80, 166,788.36 and 67,145.28 is: 92,675.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,841.80 : 166,788.36 = 67,145.28 : x
  2. Step 2: Convert to fraction form
    120,841.80/166,788.36 = 67,145.28/x
  3. Step 3: Cross multiply
    120,841.80x = 166,788.36 × 67,145.28
  4. Step 4: Simplify right side
    120,841.80x = 11,199,051,132.94
  5. Step 5: Solve for x
    x = 11,199,051,132.94/120,841.80
  6. Step 6: Final answer
    x = 92,675.31

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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.