Home / 136,221.66-187,982.96-78,863.42

Finding the Fourth Proportional to 136,221.66, 187,982.96 and 78,863.42

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Solution

The fourth proportional to 136,221.66, 187,982.96 and 78,863.42 is: 108,829.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,221.66 : 187,982.96 = 78,863.42 : x
  2. Step 2: Convert to fraction form
    136,221.66/187,982.96 = 78,863.42/x
  3. Step 3: Cross multiply
    136,221.66x = 187,982.96 × 78,863.42
  4. Step 4: Simplify right side
    136,221.66x = 14,824,979,202.96
  5. Step 5: Solve for x
    x = 14,824,979,202.96/136,221.66
  6. Step 6: Final answer
    x = 108,829.82

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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.