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Finding the Fourth Proportional to 83,940.40, 125,910.60 and 28,536.40

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Solution

The fourth proportional to 83,940.40, 125,910.60 and 28,536.40 is: 42,804.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,940.40 : 125,910.60 = 28,536.40 : x
  2. Step 2: Convert to fraction form
    83,940.40/125,910.60 = 28,536.40/x
  3. Step 3: Cross multiply
    83,940.40x = 125,910.60 × 28,536.40
  4. Step 4: Simplify right side
    83,940.40x = 3,593,035,245.84
  5. Step 5: Solve for x
    x = 3,593,035,245.84/83,940.40
  6. Step 6: Final answer
    x = 42,804.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.