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Finding the Fourth Proportional to 259,351.93, 388,700.65 and 139,110.67

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Solution

The fourth proportional to 259,351.93, 388,700.65 and 139,110.67 is: 208,490.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,351.93 : 388,700.65 = 139,110.67 : x
  2. Step 2: Convert to fraction form
    259,351.93/388,700.65 = 139,110.67/x
  3. Step 3: Cross multiply
    259,351.93x = 388,700.65 × 139,110.67
  4. Step 4: Simplify right side
    259,351.93x = 54,072,407,850.94
  5. Step 5: Solve for x
    x = 54,072,407,850.94/259,351.93
  6. Step 6: Final answer
    x = 208,490.48

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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.