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Finding the Fourth Proportional to 136,664.78, 188,602.08 and 79,299.78

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Solution

The fourth proportional to 136,664.78, 188,602.08 and 79,299.78 is: 109,436.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,664.78 : 188,602.08 = 79,299.78 : x
  2. Step 2: Convert to fraction form
    136,664.78/188,602.08 = 79,299.78/x
  3. Step 3: Cross multiply
    136,664.78x = 188,602.08 × 79,299.78
  4. Step 4: Simplify right side
    136,664.78x = 14,956,103,451.54
  5. Step 5: Solve for x
    x = 14,956,103,451.54/136,664.78
  6. Step 6: Final answer
    x = 109,436.41

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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.