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Finding the Fourth Proportional to 136,785.33, 188,758.83 and 85,825.53

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Solution

The fourth proportional to 136,785.33, 188,758.83 and 85,825.53 is: 118,436.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,785.33 : 188,758.83 = 85,825.53 : x
  2. Step 2: Convert to fraction form
    136,785.33/188,758.83 = 85,825.53/x
  3. Step 3: Cross multiply
    136,785.33x = 188,758.83 × 85,825.53
  4. Step 4: Simplify right side
    136,785.33x = 16,200,326,626.93
  5. Step 5: Solve for x
    x = 16,200,326,626.93/136,785.33
  6. Step 6: Final answer
    x = 118,436.14

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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.