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Finding the Fourth Proportional to 92,894.20, 128,204.94 and 55,168.48

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Solution

The fourth proportional to 92,894.20, 128,204.94 and 55,168.48 is: 76,139.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,894.20 : 128,204.94 = 55,168.48 : x
  2. Step 2: Convert to fraction form
    92,894.20/128,204.94 = 55,168.48/x
  3. Step 3: Cross multiply
    92,894.20x = 128,204.94 × 55,168.48
  4. Step 4: Simplify right side
    92,894.20x = 7,072,871,668.29
  5. Step 5: Solve for x
    x = 7,072,871,668.29/92,894.20
  6. Step 6: Final answer
    x = 76,139.00

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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.