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Finding the Fourth Proportional to 78,976.67, 108,987.54 and 43,166.66

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Solution

The fourth proportional to 78,976.67, 108,987.54 and 43,166.66 is: 59,569.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,976.67 : 108,987.54 = 43,166.66 : x
  2. Step 2: Convert to fraction form
    78,976.67/108,987.54 = 43,166.66/x
  3. Step 3: Cross multiply
    78,976.67x = 108,987.54 × 43,166.66
  4. Step 4: Simplify right side
    78,976.67x = 4,704,628,083.42
  5. Step 5: Solve for x
    x = 4,704,628,083.42/78,976.67
  6. Step 6: Final answer
    x = 59,569.85

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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.