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Finding the Fourth Proportional to 122,912.72, 169,619.68 and 69,198.16

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Solution

The fourth proportional to 122,912.72, 169,619.68 and 69,198.16 is: 95,493.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,912.72 : 169,619.68 = 69,198.16 : x
  2. Step 2: Convert to fraction form
    122,912.72/169,619.68 = 69,198.16/x
  3. Step 3: Cross multiply
    122,912.72x = 169,619.68 × 69,198.16
  4. Step 4: Simplify right side
    122,912.72x = 11,737,369,755.79
  5. Step 5: Solve for x
    x = 11,737,369,755.79/122,912.72
  6. Step 6: Final answer
    x = 95,493.53

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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.