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Finding the Fourth Proportional to 85,171.83, 117,539.79 and 48,879.91

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Solution

The fourth proportional to 85,171.83, 117,539.79 and 48,879.91 is: 67,455.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,171.83 : 117,539.79 = 48,879.91 : x
  2. Step 2: Convert to fraction form
    85,171.83/117,539.79 = 48,879.91/x
  3. Step 3: Cross multiply
    85,171.83x = 117,539.79 × 48,879.91
  4. Step 4: Simplify right side
    85,171.83x = 5,745,334,356.62
  5. Step 5: Solve for x
    x = 5,745,334,356.62/85,171.83
  6. Step 6: Final answer
    x = 67,455.81

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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.