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Finding the Fourth Proportional to 78,858.36, 108,825.93 and 43,049.88

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Solution

The fourth proportional to 78,858.36, 108,825.93 and 43,049.88 is: 59,409.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,858.36 : 108,825.93 = 43,049.88 : x
  2. Step 2: Convert to fraction form
    78,858.36/108,825.93 = 43,049.88/x
  3. Step 3: Cross multiply
    78,858.36x = 108,825.93 × 43,049.88
  4. Step 4: Simplify right side
    78,858.36x = 4,684,943,227.39
  5. Step 5: Solve for x
    x = 4,684,943,227.39/78,858.36
  6. Step 6: Final answer
    x = 59,409.59

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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.