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Finding the Fourth Proportional to 253,908.78, 350,389.11 and 139,187.67

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Solution

The fourth proportional to 253,908.78, 350,389.11 and 139,187.67 is: 192,076.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,908.78 : 350,389.11 = 139,187.67 : x
  2. Step 2: Convert to fraction form
    253,908.78/350,389.11 = 139,187.67/x
  3. Step 3: Cross multiply
    253,908.78x = 350,389.11 × 139,187.67
  4. Step 4: Simplify right side
    253,908.78x = 48,769,843,814.27
  5. Step 5: Solve for x
    x = 48,769,843,814.27/253,908.78
  6. Step 6: Final answer
    x = 192,076.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.