Home / 135,601.92-187,136.22-78,258.78

Finding the Fourth Proportional to 135,601.92, 187,136.22 and 78,258.78

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Solution

The fourth proportional to 135,601.92, 187,136.22 and 78,258.78 is: 108,000.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,601.92 : 187,136.22 = 78,258.78 : x
  2. Step 2: Convert to fraction form
    135,601.92/187,136.22 = 78,258.78/x
  3. Step 3: Cross multiply
    135,601.92x = 187,136.22 × 78,258.78
  4. Step 4: Simplify right side
    135,601.92x = 14,645,052,271.01
  5. Step 5: Solve for x
    x = 14,645,052,271.01/135,601.92
  6. Step 6: Final answer
    x = 108,000.33

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1.5x scale

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.