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Finding the Fourth Proportional to 189,154.88, 261,042.72 and 108,581.12

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Solution

The fourth proportional to 189,154.88, 261,042.72 and 108,581.12 is: 149,847.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,154.88 : 261,042.72 = 108,581.12 : x
  2. Step 2: Convert to fraction form
    189,154.88/261,042.72 = 108,581.12/x
  3. Step 3: Cross multiply
    189,154.88x = 261,042.72 × 108,581.12
  4. Step 4: Simplify right side
    189,154.88x = 28,344,310,905.45
  5. Step 5: Solve for x
    x = 28,344,310,905.45/189,154.88
  6. Step 6: Final answer
    x = 149,847.10

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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.