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Finding the Fourth Proportional to 92,989.88, 128,326.42 and 50,548.60

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Solution

The fourth proportional to 92,989.88, 128,326.42 and 50,548.60 is: 69,757.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,989.88 : 128,326.42 = 50,548.60 : x
  2. Step 2: Convert to fraction form
    92,989.88/128,326.42 = 50,548.60/x
  3. Step 3: Cross multiply
    92,989.88x = 128,326.42 × 50,548.60
  4. Step 4: Simplify right side
    92,989.88x = 6,486,720,874.01
  5. Step 5: Solve for x
    x = 6,486,720,874.01/92,989.88
  6. Step 6: Final answer
    x = 69,757.28

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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.