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Finding the Fourth Proportional to 315,136.80, 434,872.80 and 171,895.68

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Solution

The fourth proportional to 315,136.80, 434,872.80 and 171,895.68 is: 237,207.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,136.80 : 434,872.80 = 171,895.68 : x
  2. Step 2: Convert to fraction form
    315,136.80/434,872.80 = 171,895.68/x
  3. Step 3: Cross multiply
    315,136.80x = 434,872.80 × 171,895.68
  4. Step 4: Simplify right side
    315,136.80x = 74,752,755,669.50
  5. Step 5: Solve for x
    x = 74,752,755,669.50/315,136.80
  6. Step 6: Final answer
    x = 237,207.32

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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.