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Finding the Fourth Proportional to 189,155.45, 284,054.56 and 126,378.97

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Solution

The fourth proportional to 189,155.45, 284,054.56 and 126,378.97 is: 189,783.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,155.45 : 284,054.56 = 126,378.97 : x
  2. Step 2: Convert to fraction form
    189,155.45/284,054.56 = 126,378.97/x
  3. Step 3: Cross multiply
    189,155.45x = 284,054.56 × 126,378.97
  4. Step 4: Simplify right side
    189,155.45x = 35,898,522,716.60
  5. Step 5: Solve for x
    x = 35,898,522,716.60/189,155.45
  6. Step 6: Final answer
    x = 189,783.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.