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Finding the Fourth Proportional to 78,517.44, 117,759.48 and 25,914.40

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Solution

The fourth proportional to 78,517.44, 117,759.48 and 25,914.40 is: 38,866.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,517.44 : 117,759.48 = 25,914.40 : x
  2. Step 2: Convert to fraction form
    78,517.44/117,759.48 = 25,914.40/x
  3. Step 3: Cross multiply
    78,517.44x = 117,759.48 × 25,914.40
  4. Step 4: Simplify right side
    78,517.44x = 3,051,666,268.51
  5. Step 5: Solve for x
    x = 3,051,666,268.51/78,517.44
  6. Step 6: Final answer
    x = 38,866.09

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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.