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Finding the Fourth Proportional to 136,858.89, 188,863.37 and 79,530.60

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Solution

The fourth proportional to 136,858.89, 188,863.37 and 79,530.60 is: 109,751.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,858.89 : 188,863.37 = 79,530.60 : x
  2. Step 2: Convert to fraction form
    136,858.89/188,863.37 = 79,530.60/x
  3. Step 3: Cross multiply
    136,858.89x = 188,863.37 × 79,530.60
  4. Step 4: Simplify right side
    136,858.89x = 15,020,416,736.47
  5. Step 5: Solve for x
    x = 15,020,416,736.47/136,858.89
  6. Step 6: Final answer
    x = 109,751.12

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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.