Home / 136,177.72-187,912.06-78,805.64

Finding the Fourth Proportional to 136,177.72, 187,912.06 and 78,805.64

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Solution

The fourth proportional to 136,177.72, 187,912.06 and 78,805.64 is: 108,744.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,177.72 : 187,912.06 = 78,805.64 : x
  2. Step 2: Convert to fraction form
    136,177.72/187,912.06 = 78,805.64/x
  3. Step 3: Cross multiply
    136,177.72x = 187,912.06 × 78,805.64
  4. Step 4: Simplify right side
    136,177.72x = 14,808,530,424.78
  5. Step 5: Solve for x
    x = 14,808,530,424.78/136,177.72
  6. Step 6: Final answer
    x = 108,744.15

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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.