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Finding the Fourth Proportional to 120,890.75, 166,777.50 and 75,489.91

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Solution

The fourth proportional to 120,890.75, 166,777.50 and 75,489.91 is: 104,143.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,890.75 : 166,777.50 = 75,489.91 : x
  2. Step 2: Convert to fraction form
    120,890.75/166,777.50 = 75,489.91/x
  3. Step 3: Cross multiply
    120,890.75x = 166,777.50 × 75,489.91
  4. Step 4: Simplify right side
    120,890.75x = 12,590,019,376.68
  5. Step 5: Solve for x
    x = 12,590,019,376.68/120,890.75
  6. Step 6: Final answer
    x = 104,143.77

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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.