Home / 136,099.36-187,841.82-78,731.92

Finding the Fourth Proportional to 136,099.36, 187,841.82 and 78,731.92

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Solution

The fourth proportional to 136,099.36, 187,841.82 and 78,731.92 is: 108,664.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,099.36 : 187,841.82 = 78,731.92 : x
  2. Step 2: Convert to fraction form
    136,099.36/187,841.82 = 78,731.92/x
  3. Step 3: Cross multiply
    136,099.36x = 187,841.82 × 78,731.92
  4. Step 4: Simplify right side
    136,099.36x = 14,789,147,144.89
  5. Step 5: Solve for x
    x = 14,789,147,144.89/136,099.36
  6. Step 6: Final answer
    x = 108,664.34

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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.