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Finding the Fourth Proportional to 93,978.11, 129,692.79 and 51,536.54

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Solution

The fourth proportional to 93,978.11, 129,692.79 and 51,536.54 is: 71,122.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,978.11 : 129,692.79 = 51,536.54 : x
  2. Step 2: Convert to fraction form
    93,978.11/129,692.79 = 51,536.54/x
  3. Step 3: Cross multiply
    93,978.11x = 129,692.79 × 51,536.54
  4. Step 4: Simplify right side
    93,978.11x = 6,683,917,011.08
  5. Step 5: Solve for x
    x = 6,683,917,011.08/93,978.11
  6. Step 6: Final answer
    x = 71,122.07

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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.