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Finding the Fourth Proportional to 112,912.82, 169,369.30 and 28,679.30

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Solution

The fourth proportional to 112,912.82, 169,369.30 and 28,679.30 is: 43,018.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,912.82 : 169,369.30 = 28,679.30 : x
  2. Step 2: Convert to fraction form
    112,912.82/169,369.30 = 28,679.30/x
  3. Step 3: Cross multiply
    112,912.82x = 169,369.30 × 28,679.30
  4. Step 4: Simplify right side
    112,912.82x = 4,857,392,965.49
  5. Step 5: Solve for x
    x = 4,857,392,965.49/112,912.82
  6. Step 6: Final answer
    x = 43,018.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.