Home / 100,391.35-138,516.83-60,089.80

Finding the Fourth Proportional to 100,391.35, 138,516.83 and 60,089.80

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Solution

The fourth proportional to 100,391.35, 138,516.83 and 60,089.80 is: 82,910.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,391.35 : 138,516.83 = 60,089.80 : x
  2. Step 2: Convert to fraction form
    100,391.35/138,516.83 = 60,089.80/x
  3. Step 3: Cross multiply
    100,391.35x = 138,516.83 × 60,089.80
  4. Step 4: Simplify right side
    100,391.35x = 8,323,448,611.33
  5. Step 5: Solve for x
    x = 8,323,448,611.33/100,391.35
  6. Step 6: Final answer
    x = 82,910.02

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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.