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Finding the Fourth Proportional to 120,508.56, 166,311.77 and 66,810.42

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Solution

The fourth proportional to 120,508.56, 166,311.77 and 66,810.42 is: 92,203.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,508.56 : 166,311.77 = 66,810.42 : x
  2. Step 2: Convert to fraction form
    120,508.56/166,311.77 = 66,810.42/x
  3. Step 3: Cross multiply
    120,508.56x = 166,311.77 × 66,810.42
  4. Step 4: Simplify right side
    120,508.56x = 11,111,358,870.59
  5. Step 5: Solve for x
    x = 11,111,358,870.59/120,508.56
  6. Step 6: Final answer
    x = 92,203.90

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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.