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Finding the Fourth Proportional to 136,782.92, 188,763.62 and 85,797.81

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Solution

The fourth proportional to 136,782.92, 188,763.62 and 85,797.81 is: 118,402.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,782.92 : 188,763.62 = 85,797.81 : x
  2. Step 2: Convert to fraction form
    136,782.92/188,763.62 = 85,797.81/x
  3. Step 3: Cross multiply
    136,782.92x = 188,763.62 × 85,797.81
  4. Step 4: Simplify right side
    136,782.92x = 16,195,504,774.68
  5. Step 5: Solve for x
    x = 16,195,504,774.68/136,782.92
  6. Step 6: Final answer
    x = 118,402.98

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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.