Home / 78,538.97-117,857.67-31,791.84

Finding the Fourth Proportional to 78,538.97, 117,857.67 and 31,791.84

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Solution

The fourth proportional to 78,538.97, 117,857.67 and 31,791.84 is: 47,707.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,538.97 : 117,857.67 = 31,791.84 : x
  2. Step 2: Convert to fraction form
    78,538.97/117,857.67 = 31,791.84/x
  3. Step 3: Cross multiply
    78,538.97x = 117,857.67 × 31,791.84
  4. Step 4: Simplify right side
    78,538.97x = 3,746,912,289.18
  5. Step 5: Solve for x
    x = 3,746,912,289.18/78,538.97
  6. Step 6: Final answer
    x = 47,707.68

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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.