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Finding the Fourth Proportional to 169,418.78, 253,962.93 and 80,648.45

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Solution

The fourth proportional to 169,418.78, 253,962.93 and 80,648.45 is: 120,894.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,418.78 : 253,962.93 = 80,648.45 : x
  2. Step 2: Convert to fraction form
    169,418.78/253,962.93 = 80,648.45/x
  3. Step 3: Cross multiply
    169,418.78x = 253,962.93 × 80,648.45
  4. Step 4: Simplify right side
    169,418.78x = 20,481,716,661.96
  5. Step 5: Solve for x
    x = 20,481,716,661.96/169,418.78
  6. Step 6: Final answer
    x = 120,894.02

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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.