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Finding the Fourth Proportional to 169,417.78, 253,961.43 and 80,647.45

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Solution

The fourth proportional to 169,417.78, 253,961.43 and 80,647.45 is: 120,892.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,417.78 : 253,961.43 = 80,647.45 : x
  2. Step 2: Convert to fraction form
    169,417.78/253,961.43 = 80,647.45/x
  3. Step 3: Cross multiply
    169,417.78x = 253,961.43 × 80,647.45
  4. Step 4: Simplify right side
    169,417.78x = 20,481,340,790.52
  5. Step 5: Solve for x
    x = 20,481,340,790.52/169,417.78
  6. Step 6: Final answer
    x = 120,892.51

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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.