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Finding the Fourth Proportional to 78,940.19, 108,944.87 and 43,135.52

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Solution

The fourth proportional to 78,940.19, 108,944.87 and 43,135.52 is: 59,531.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,940.19 : 108,944.87 = 43,135.52 : x
  2. Step 2: Convert to fraction form
    78,940.19/108,944.87 = 43,135.52/x
  3. Step 3: Cross multiply
    78,940.19x = 108,944.87 × 43,135.52
  4. Step 4: Simplify right side
    78,940.19x = 4,699,392,858.38
  5. Step 5: Solve for x
    x = 4,699,392,858.38/78,940.19
  6. Step 6: Final answer
    x = 59,531.05

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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.