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Finding the Fourth Proportional to 253,243.72, 379,696.83 and 139,445.13

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Solution

The fourth proportional to 253,243.72, 379,696.83 and 139,445.13 is: 209,074.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,243.72 : 379,696.83 = 139,445.13 : x
  2. Step 2: Convert to fraction form
    253,243.72/379,696.83 = 139,445.13/x
  3. Step 3: Cross multiply
    253,243.72x = 379,696.83 × 139,445.13
  4. Step 4: Simplify right side
    253,243.72x = 52,946,873,819.94
  5. Step 5: Solve for x
    x = 52,946,873,819.94/253,243.72
  6. Step 6: Final answer
    x = 209,074.78

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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.