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Finding the Fourth Proportional to 171,845.80, 257,768.70 and 115,712.80

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Solution

The fourth proportional to 171,845.80, 257,768.70 and 115,712.80 is: 173,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,845.80 : 257,768.70 = 115,712.80 : x
  2. Step 2: Convert to fraction form
    171,845.80/257,768.70 = 115,712.80/x
  3. Step 3: Cross multiply
    171,845.80x = 257,768.70 × 115,712.80
  4. Step 4: Simplify right side
    171,845.80x = 29,827,138,029.36
  5. Step 5: Solve for x
    x = 29,827,138,029.36/171,845.80
  6. Step 6: Final answer
    x = 173,569.20

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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.