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Finding the Fourth Proportional to 136,642.83, 188,654.84 and 85,725.37

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Solution

The fourth proportional to 136,642.83, 188,654.84 and 85,725.37 is: 118,356.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,642.83 : 188,654.84 = 85,725.37 : x
  2. Step 2: Convert to fraction form
    136,642.83/188,654.84 = 85,725.37/x
  3. Step 3: Cross multiply
    136,642.83x = 188,654.84 × 85,725.37
  4. Step 4: Simplify right side
    136,642.83x = 16,172,505,961.29
  5. Step 5: Solve for x
    x = 16,172,505,961.29/136,642.83
  6. Step 6: Final answer
    x = 118,356.05

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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.