Home / 78,467.32-117,664.12-28,512.19

Finding the Fourth Proportional to 78,467.32, 117,664.12 and 28,512.19

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Solution

The fourth proportional to 78,467.32, 117,664.12 and 28,512.19 is: 42,754.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,467.32 : 117,664.12 = 28,512.19 : x
  2. Step 2: Convert to fraction form
    78,467.32/117,664.12 = 28,512.19/x
  3. Step 3: Cross multiply
    78,467.32x = 117,664.12 × 28,512.19
  4. Step 4: Simplify right side
    78,467.32x = 3,354,861,745.62
  5. Step 5: Solve for x
    x = 3,354,861,745.62/78,467.32
  6. Step 6: Final answer
    x = 42,754.89

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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.