Home / 78,186.26-117,279.36-19,021.94

Finding the Fourth Proportional to 78,186.26, 117,279.36 and 19,021.94

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Solution

The fourth proportional to 78,186.26, 117,279.36 and 19,021.94 is: 28,532.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,186.26 : 117,279.36 = 19,021.94 : x
  2. Step 2: Convert to fraction form
    78,186.26/117,279.36 = 19,021.94/x
  3. Step 3: Cross multiply
    78,186.26x = 117,279.36 × 19,021.94
  4. Step 4: Simplify right side
    78,186.26x = 2,230,880,949.16
  5. Step 5: Solve for x
    x = 2,230,880,949.16/78,186.26
  6. Step 6: Final answer
    x = 28,532.90

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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.