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Finding the Fourth Proportional to 120,628.59, 166,487.42 and 66,930.90

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Solution

The fourth proportional to 120,628.59, 166,487.42 and 66,930.90 is: 92,375.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,628.59 : 166,487.42 = 66,930.90 : x
  2. Step 2: Convert to fraction form
    120,628.59/166,487.42 = 66,930.90/x
  3. Step 3: Cross multiply
    120,628.59x = 166,487.42 × 66,930.90
  4. Step 4: Simplify right side
    120,628.59x = 11,143,152,962.28
  5. Step 5: Solve for x
    x = 11,143,152,962.28/120,628.59
  6. Step 6: Final answer
    x = 92,375.72

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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.