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Finding the Fourth Proportional to 120,861.55, 166,791.87 and 67,148.83

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Solution

The fourth proportional to 120,861.55, 166,791.87 and 67,148.83 is: 92,667.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,861.55 : 166,791.87 = 67,148.83 : x
  2. Step 2: Convert to fraction form
    120,861.55/166,791.87 = 67,148.83/x
  3. Step 3: Cross multiply
    120,861.55x = 166,791.87 × 67,148.83
  4. Step 4: Simplify right side
    120,861.55x = 11,199,878,924.01
  5. Step 5: Solve for x
    x = 11,199,878,924.01/120,861.55
  6. Step 6: Final answer
    x = 92,667.01

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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.