Home / 78,301.86-117,452.37-19,137.78

Finding the Fourth Proportional to 78,301.86, 117,452.37 and 19,137.78

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Solution

The fourth proportional to 78,301.86, 117,452.37 and 19,137.78 is: 28,706.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,301.86 : 117,452.37 = 19,137.78 : x
  2. Step 2: Convert to fraction form
    78,301.86/117,452.37 = 19,137.78/x
  3. Step 3: Cross multiply
    78,301.86x = 117,452.37 × 19,137.78
  4. Step 4: Simplify right side
    78,301.86x = 2,247,777,617.54
  5. Step 5: Solve for x
    x = 2,247,777,617.54/78,301.86
  6. Step 6: Final answer
    x = 28,706.57

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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.