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Finding the Fourth Proportional to 78,708.77, 108,618.13 and 44,717.31

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Solution

The fourth proportional to 78,708.77, 108,618.13 and 44,717.31 is: 61,709.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,708.77 : 108,618.13 = 44,717.31 : x
  2. Step 2: Convert to fraction form
    78,708.77/108,618.13 = 44,717.31/x
  3. Step 3: Cross multiply
    78,708.77x = 108,618.13 × 44,717.31
  4. Step 4: Simplify right side
    78,708.77x = 4,857,110,664.68
  5. Step 5: Solve for x
    x = 4,857,110,664.68/78,708.77
  6. Step 6: Final answer
    x = 61,709.91

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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.