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Finding the Fourth Proportional to 189,003.54, 260,836.71 and 104,120.61

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Solution

The fourth proportional to 189,003.54, 260,836.71 and 104,120.61 is: 143,692.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,003.54 : 260,836.71 = 104,120.61 : x
  2. Step 2: Convert to fraction form
    189,003.54/260,836.71 = 104,120.61/x
  3. Step 3: Cross multiply
    189,003.54x = 260,836.71 × 104,120.61
  4. Step 4: Simplify right side
    189,003.54x = 27,158,477,355.59
  5. Step 5: Solve for x
    x = 27,158,477,355.59/189,003.54
  6. Step 6: Final answer
    x = 143,692.96

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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.