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Finding the Fourth Proportional to 78,917.22, 108,901.80 and 43,100.64

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Solution

The fourth proportional to 78,917.22, 108,901.80 and 43,100.64 is: 59,476.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,917.22 : 108,901.80 = 43,100.64 : x
  2. Step 2: Convert to fraction form
    78,917.22/108,901.80 = 43,100.64/x
  3. Step 3: Cross multiply
    78,917.22x = 108,901.80 × 43,100.64
  4. Step 4: Simplify right side
    78,917.22x = 4,693,737,277.15
  5. Step 5: Solve for x
    x = 4,693,737,277.15/78,917.22
  6. Step 6: Final answer
    x = 59,476.72

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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.