Home / 78,447.92-117,669-19,283.76

Finding the Fourth Proportional to 78,447.92, 117,669 and 19,283.76

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Solution

The fourth proportional to 78,447.92, 117,669 and 19,283.76 is: 28,924.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,447.92 : 117,669 = 19,283.76 : x
  2. Step 2: Convert to fraction form
    78,447.92/117,669 = 19,283.76/x
  3. Step 3: Cross multiply
    78,447.92x = 117,669 × 19,283.76
  4. Step 4: Simplify right side
    78,447.92x = 2,269,100,755.44
  5. Step 5: Solve for x
    x = 2,269,100,755.44/78,447.92
  6. Step 6: Final answer
    x = 28,924.93

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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.