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Finding the Fourth Proportional to 118,879.08, 178,327.90 and 39,992.68

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Solution

The fourth proportional to 118,879.08, 178,327.90 and 39,992.68 is: 59,992.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,879.08 : 178,327.90 = 39,992.68 : x
  2. Step 2: Convert to fraction form
    118,879.08/178,327.90 = 39,992.68/x
  3. Step 3: Cross multiply
    118,879.08x = 178,327.90 × 39,992.68
  4. Step 4: Simplify right side
    118,879.08x = 7,131,810,639.77
  5. Step 5: Solve for x
    x = 7,131,810,639.77/118,879.08
  6. Step 6: Final answer
    x = 59,992.14

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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.