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Finding the Fourth Proportional to 78,912.77, 108,897.86 and 43,102.91

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Solution

The fourth proportional to 78,912.77, 108,897.86 and 43,102.91 is: 59,481.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,912.77 : 108,897.86 = 43,102.91 : x
  2. Step 2: Convert to fraction form
    78,912.77/108,897.86 = 43,102.91/x
  3. Step 3: Cross multiply
    78,912.77x = 108,897.86 × 43,102.91
  4. Step 4: Simplify right side
    78,912.77x = 4,693,814,658.77
  5. Step 5: Solve for x
    x = 4,693,814,658.77/78,912.77
  6. Step 6: Final answer
    x = 59,481.05

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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.