Home / 78,441.40-117,636.82-25,838.36

Finding the Fourth Proportional to 78,441.40, 117,636.82 and 25,838.36

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Solution

The fourth proportional to 78,441.40, 117,636.82 and 25,838.36 is: 38,749.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,441.40 : 117,636.82 = 25,838.36 : x
  2. Step 2: Convert to fraction form
    78,441.40/117,636.82 = 25,838.36/x
  3. Step 3: Cross multiply
    78,441.40x = 117,636.82 × 25,838.36
  4. Step 4: Simplify right side
    78,441.40x = 3,039,542,504.42
  5. Step 5: Solve for x
    x = 3,039,542,504.42/78,441.40
  6. Step 6: Final answer
    x = 38,749.21

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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.