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Finding the Fourth Proportional to 77,455.58, 106,879.91 and 43,456.97

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Solution

The fourth proportional to 77,455.58, 106,879.91 and 43,456.97 is: 59,965.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,455.58 : 106,879.91 = 43,456.97 : x
  2. Step 2: Convert to fraction form
    77,455.58/106,879.91 = 43,456.97/x
  3. Step 3: Cross multiply
    77,455.58x = 106,879.91 × 43,456.97
  4. Step 4: Simplify right side
    77,455.58x = 4,644,677,092.39
  5. Step 5: Solve for x
    x = 4,644,677,092.39/77,455.58
  6. Step 6: Final answer
    x = 59,965.69

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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.