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Finding the Fourth Proportional to 120,120.42, 165,753.50 and 66,396.77

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Solution

The fourth proportional to 120,120.42, 165,753.50 and 66,396.77 is: 91,620.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,120.42 : 165,753.50 = 66,396.77 : x
  2. Step 2: Convert to fraction form
    120,120.42/165,753.50 = 66,396.77/x
  3. Step 3: Cross multiply
    120,120.42x = 165,753.50 × 66,396.77
  4. Step 4: Simplify right side
    120,120.42x = 11,005,495,855.44
  5. Step 5: Solve for x
    x = 11,005,495,855.44/120,120.42
  6. Step 6: Final answer
    x = 91,620.52

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1.5x scale

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.