Home / 129,942.70-194,914.05-79,860.40

Finding the Fourth Proportional to 129,942.70, 194,914.05 and 79,860.40

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Solution

The fourth proportional to 129,942.70, 194,914.05 and 79,860.40 is: 119,790.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,942.70 : 194,914.05 = 79,860.40 : x
  2. Step 2: Convert to fraction form
    129,942.70/194,914.05 = 79,860.40/x
  3. Step 3: Cross multiply
    129,942.70x = 194,914.05 × 79,860.40
  4. Step 4: Simplify right side
    129,942.70x = 15,565,913,998.62
  5. Step 5: Solve for x
    x = 15,565,913,998.62/129,942.70
  6. Step 6: Final answer
    x = 119,790.60

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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.