Home / 78,401.44-117,620.40-25,811.38

Finding the Fourth Proportional to 78,401.44, 117,620.40 and 25,811.38

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Solution

The fourth proportional to 78,401.44, 117,620.40 and 25,811.38 is: 38,723.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,401.44 : 117,620.40 = 25,811.38 : x
  2. Step 2: Convert to fraction form
    78,401.44/117,620.40 = 25,811.38/x
  3. Step 3: Cross multiply
    78,401.44x = 117,620.40 × 25,811.38
  4. Step 4: Simplify right side
    78,401.44x = 3,035,944,840.15
  5. Step 5: Solve for x
    x = 3,035,944,840.15/78,401.44
  6. Step 6: Final answer
    x = 38,723.07

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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.