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Finding the Fourth Proportional to 123,879.78, 185,818.79 and 35,133.21

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Solution

The fourth proportional to 123,879.78, 185,818.79 and 35,133.21 is: 52,699.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,879.78 : 185,818.79 = 35,133.21 : x
  2. Step 2: Convert to fraction form
    123,879.78/185,818.79 = 35,133.21/x
  3. Step 3: Cross multiply
    123,879.78x = 185,818.79 × 35,133.21
  4. Step 4: Simplify right side
    123,879.78x = 6,528,410,658.85
  5. Step 5: Solve for x
    x = 6,528,410,658.85/123,879.78
  6. Step 6: Final answer
    x = 52,699.57

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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.