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Finding the Fourth Proportional to 136,291.92, 188,045.08 and 81,829.92

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Solution

The fourth proportional to 136,291.92, 188,045.08 and 81,829.92 is: 112,902.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,291.92 : 188,045.08 = 81,829.92 : x
  2. Step 2: Convert to fraction form
    136,291.92/188,045.08 = 81,829.92/x
  3. Step 3: Cross multiply
    136,291.92x = 188,045.08 × 81,829.92
  4. Step 4: Simplify right side
    136,291.92x = 15,387,713,852.79
  5. Step 5: Solve for x
    x = 15,387,713,852.79/136,291.92
  6. Step 6: Final answer
    x = 112,902.61

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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.