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Finding the Fourth Proportional to 93,425.82, 128,840.55 and 61,539.30

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Solution

The fourth proportional to 93,425.82, 128,840.55 and 61,539.30 is: 84,866.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,425.82 : 128,840.55 = 61,539.30 : x
  2. Step 2: Convert to fraction form
    93,425.82/128,840.55 = 61,539.30/x
  3. Step 3: Cross multiply
    93,425.82x = 128,840.55 × 61,539.30
  4. Step 4: Simplify right side
    93,425.82x = 7,928,757,258.62
  5. Step 5: Solve for x
    x = 7,928,757,258.62/93,425.82
  6. Step 6: Final answer
    x = 84,866.87

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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.