Home / 78,370.86-117,519.24-30,361.96

Finding the Fourth Proportional to 78,370.86, 117,519.24 and 30,361.96

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Solution

The fourth proportional to 78,370.86, 117,519.24 and 30,361.96 is: 45,528.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,370.86 : 117,519.24 = 30,361.96 : x
  2. Step 2: Convert to fraction form
    78,370.86/117,519.24 = 30,361.96/x
  3. Step 3: Cross multiply
    78,370.86x = 117,519.24 × 30,361.96
  4. Step 4: Simplify right side
    78,370.86x = 3,568,113,893.04
  5. Step 5: Solve for x
    x = 3,568,113,893.04/78,370.86
  6. Step 6: Final answer
    x = 45,528.58

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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.