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Finding the Fourth Proportional to 120,618.59, 166,461.21 and 69,640.67

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Solution

The fourth proportional to 120,618.59, 166,461.21 and 69,640.67 is: 96,108.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,618.59 : 166,461.21 = 69,640.67 : x
  2. Step 2: Convert to fraction form
    120,618.59/166,461.21 = 69,640.67/x
  3. Step 3: Cross multiply
    120,618.59x = 166,461.21 × 69,640.67
  4. Step 4: Simplify right side
    120,618.59x = 11,592,469,361.10
  5. Step 5: Solve for x
    x = 11,592,469,361.10/120,618.59
  6. Step 6: Final answer
    x = 96,108.48

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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.