Home / 78,172.89-117,040.62-40,651.26

Finding the Fourth Proportional to 78,172.89, 117,040.62 and 40,651.26

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Solution

The fourth proportional to 78,172.89, 117,040.62 and 40,651.26 is: 60,863.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,172.89 : 117,040.62 = 40,651.26 : x
  2. Step 2: Convert to fraction form
    78,172.89/117,040.62 = 40,651.26/x
  3. Step 3: Cross multiply
    78,172.89x = 117,040.62 × 40,651.26
  4. Step 4: Simplify right side
    78,172.89x = 4,757,848,674.18
  5. Step 5: Solve for x
    x = 4,757,848,674.18/78,172.89
  6. Step 6: Final answer
    x = 60,863.15

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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.