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Finding the Fourth Proportional to 113,147.43, 169,721.16 and 28,907.79

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Solution

The fourth proportional to 113,147.43, 169,721.16 and 28,907.79 is: 43,361.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,147.43 : 169,721.16 = 28,907.79 : x
  2. Step 2: Convert to fraction form
    113,147.43/169,721.16 = 28,907.79/x
  3. Step 3: Cross multiply
    113,147.43x = 169,721.16 × 28,907.79
  4. Step 4: Simplify right side
    113,147.43x = 4,906,262,906.98
  5. Step 5: Solve for x
    x = 4,906,262,906.98/113,147.43
  6. Step 6: Final answer
    x = 43,361.68

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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.