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Finding the Fourth Proportional to 136,650.90, 188,665.92 and 85,733.40

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Solution

The fourth proportional to 136,650.90, 188,665.92 and 85,733.40 is: 118,367.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,650.90 : 188,665.92 = 85,733.40 : x
  2. Step 2: Convert to fraction form
    136,650.90/188,665.92 = 85,733.40/x
  3. Step 3: Cross multiply
    136,650.90x = 188,665.92 × 85,733.40
  4. Step 4: Simplify right side
    136,650.90x = 16,174,970,785.73
  5. Step 5: Solve for x
    x = 16,174,970,785.73/136,650.90
  6. Step 6: Final answer
    x = 118,367.10

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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.