Home / 78,629.45-117,873.32-28,674.49

Finding the Fourth Proportional to 78,629.45, 117,873.32 and 28,674.49

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Solution

The fourth proportional to 78,629.45, 117,873.32 and 28,674.49 is: 42,985.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,629.45 : 117,873.32 = 28,674.49 : x
  2. Step 2: Convert to fraction form
    78,629.45/117,873.32 = 28,674.49/x
  3. Step 3: Cross multiply
    78,629.45x = 117,873.32 × 28,674.49
  4. Step 4: Simplify right side
    78,629.45x = 3,379,957,335.61
  5. Step 5: Solve for x
    x = 3,379,957,335.61/78,629.45
  6. Step 6: Final answer
    x = 42,985.90

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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.