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Finding the Fourth Proportional to 93,418.31, 128,917.27 and 55,692.56

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Solution

The fourth proportional to 93,418.31, 128,917.27 and 55,692.56 is: 76,855.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,418.31 : 128,917.27 = 55,692.56 : x
  2. Step 2: Convert to fraction form
    93,418.31/128,917.27 = 55,692.56/x
  3. Step 3: Cross multiply
    93,418.31x = 128,917.27 × 55,692.56
  4. Step 4: Simplify right side
    93,418.31x = 7,179,733,186.42
  5. Step 5: Solve for x
    x = 7,179,733,186.42/93,418.31
  6. Step 6: Final answer
    x = 76,855.74

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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.