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Finding the Fourth Proportional to 79,400, 119,136.36 and 34,435.12

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Solution

The fourth proportional to 79,400, 119,136.36 and 34,435.12 is: 51,668.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,400 : 119,136.36 = 34,435.12 : x
  2. Step 2: Convert to fraction form
    79,400/119,136.36 = 34,435.12/x
  3. Step 3: Cross multiply
    79,400x = 119,136.36 × 34,435.12
  4. Step 4: Simplify right side
    79,400x = 4,102,474,852.96
  5. Step 5: Solve for x
    x = 4,102,474,852.96/79,400
  6. Step 6: Final answer
    x = 51,668.45

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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.