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Finding the Fourth Proportional to 315,309.33, 435,136.05 and 172,078.61

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Solution

The fourth proportional to 315,309.33, 435,136.05 and 172,078.61 is: 237,473.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,309.33 : 435,136.05 = 172,078.61 : x
  2. Step 2: Convert to fraction form
    315,309.33/435,136.05 = 172,078.61/x
  3. Step 3: Cross multiply
    315,309.33x = 435,136.05 × 172,078.61
  4. Step 4: Simplify right side
    315,309.33x = 74,877,604,469.21
  5. Step 5: Solve for x
    x = 74,877,604,469.21/315,309.33
  6. Step 6: Final answer
    x = 237,473.48

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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.