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Finding the Fourth Proportional to 78,889.58, 108,863.54 and 43,072.68

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Solution

The fourth proportional to 78,889.58, 108,863.54 and 43,072.68 is: 59,438.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,889.58 : 108,863.54 = 43,072.68 : x
  2. Step 2: Convert to fraction form
    78,889.58/108,863.54 = 43,072.68/x
  3. Step 3: Cross multiply
    78,889.58x = 108,863.54 × 43,072.68
  4. Step 4: Simplify right side
    78,889.58x = 4,689,044,422.09
  5. Step 5: Solve for x
    x = 4,689,044,422.09/78,889.58
  6. Step 6: Final answer
    x = 59,438.07

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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.