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Finding the Fourth Proportional to 122,879.61, 184,363.79 and 42,929.38

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Solution

The fourth proportional to 122,879.61, 184,363.79 and 42,929.38 is: 64,409.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,879.61 : 184,363.79 = 42,929.38 : x
  2. Step 2: Convert to fraction form
    122,879.61/184,363.79 = 42,929.38/x
  3. Step 3: Cross multiply
    122,879.61x = 184,363.79 × 42,929.38
  4. Step 4: Simplify right side
    122,879.61x = 7,914,622,845.56
  5. Step 5: Solve for x
    x = 7,914,622,845.56/122,879.61
  6. Step 6: Final answer
    x = 64,409.57

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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.