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Finding the Fourth Proportional to 139,503.36, 192,556.80 and 94,817.28

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Solution

The fourth proportional to 139,503.36, 192,556.80 and 94,817.28 is: 130,876.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,503.36 : 192,556.80 = 94,817.28 : x
  2. Step 2: Convert to fraction form
    139,503.36/192,556.80 = 94,817.28/x
  3. Step 3: Cross multiply
    139,503.36x = 192,556.80 × 94,817.28
  4. Step 4: Simplify right side
    139,503.36x = 18,257,712,021.50
  5. Step 5: Solve for x
    x = 18,257,712,021.50/139,503.36
  6. Step 6: Final answer
    x = 130,876.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.