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Finding the Fourth Proportional to 78,836, 108,796 and 43,028.30

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Solution

The fourth proportional to 78,836, 108,796 and 43,028.30 is: 59,380.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,836 : 108,796 = 43,028.30 : x
  2. Step 2: Convert to fraction form
    78,836/108,796 = 43,028.30/x
  3. Step 3: Cross multiply
    78,836x = 108,796 × 43,028.30
  4. Step 4: Simplify right side
    78,836x = 4,681,306,926.80
  5. Step 5: Solve for x
    x = 4,681,306,926.80/78,836
  6. Step 6: Final answer
    x = 59,380.32

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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.