Home / 79,206.99-118,515.20-78,321.21

Finding the Fourth Proportional to 79,206.99, 118,515.20 and 78,321.21

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Solution

The fourth proportional to 79,206.99, 118,515.20 and 78,321.21 is: 117,189.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,206.99 : 118,515.20 = 78,321.21 : x
  2. Step 2: Convert to fraction form
    79,206.99/118,515.20 = 78,321.21/x
  3. Step 3: Cross multiply
    79,206.99x = 118,515.20 × 78,321.21
  4. Step 4: Simplify right side
    79,206.99x = 9,282,253,475.79
  5. Step 5: Solve for x
    x = 9,282,253,475.79/79,206.99
  6. Step 6: Final answer
    x = 117,189.83

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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.