Home / 129,561.15-193,902.78-79,672.84

Finding the Fourth Proportional to 129,561.15, 193,902.78 and 79,672.84

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Solution

The fourth proportional to 129,561.15, 193,902.78 and 79,672.84 is: 119,239.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,561.15 : 193,902.78 = 79,672.84 : x
  2. Step 2: Convert to fraction form
    129,561.15/193,902.78 = 79,672.84/x
  3. Step 3: Cross multiply
    129,561.15x = 193,902.78 × 79,672.84
  4. Step 4: Simplify right side
    129,561.15x = 15,448,785,166.50
  5. Step 5: Solve for x
    x = 15,448,785,166.50/129,561.15
  6. Step 6: Final answer
    x = 119,239.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.