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Finding the Fourth Proportional to 104,338.78, 143,990.78 and 59,015.88

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Solution

The fourth proportional to 104,338.78, 143,990.78 and 59,015.88 is: 81,443.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,338.78 : 143,990.78 = 59,015.88 : x
  2. Step 2: Convert to fraction form
    104,338.78/143,990.78 = 59,015.88/x
  3. Step 3: Cross multiply
    104,338.78x = 143,990.78 × 59,015.88
  4. Step 4: Simplify right side
    104,338.78x = 8,497,742,298.51
  5. Step 5: Solve for x
    x = 8,497,742,298.51/104,338.78
  6. Step 6: Final answer
    x = 81,443.76

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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.