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Finding the Fourth Proportional to 253,123.36, 379,320.86 and 108,989.61

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Solution

The fourth proportional to 253,123.36, 379,320.86 and 108,989.61 is: 163,327.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,123.36 : 379,320.86 = 108,989.61 : x
  2. Step 2: Convert to fraction form
    253,123.36/379,320.86 = 108,989.61/x
  3. Step 3: Cross multiply
    253,123.36x = 379,320.86 × 108,989.61
  4. Step 4: Simplify right side
    253,123.36x = 41,342,033,272.09
  5. Step 5: Solve for x
    x = 41,342,033,272.09/253,123.36
  6. Step 6: Final answer
    x = 163,327.61

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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.