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Finding the Fourth Proportional to 189,630.72, 261,685.44 and 104,734.08

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Solution

The fourth proportional to 189,630.72, 261,685.44 and 104,734.08 is: 144,530.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,630.72 : 261,685.44 = 104,734.08 : x
  2. Step 2: Convert to fraction form
    189,630.72/261,685.44 = 104,734.08/x
  3. Step 3: Cross multiply
    189,630.72x = 261,685.44 × 104,734.08
  4. Step 4: Simplify right side
    189,630.72x = 27,407,383,807.80
  5. Step 5: Solve for x
    x = 27,407,383,807.80/189,630.72
  6. Step 6: Final answer
    x = 144,530.29

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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.