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Finding the Fourth Proportional to 189,515.98, 261,189.50 and 157,079.78

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Solution

The fourth proportional to 189,515.98, 261,189.50 and 157,079.78 is: 216,486.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,515.98 : 261,189.50 = 157,079.78 : x
  2. Step 2: Convert to fraction form
    189,515.98/261,189.50 = 157,079.78/x
  3. Step 3: Cross multiply
    189,515.98x = 261,189.50 × 157,079.78
  4. Step 4: Simplify right side
    189,515.98x = 41,027,589,198.31
  5. Step 5: Solve for x
    x = 41,027,589,198.31/189,515.98
  6. Step 6: Final answer
    x = 216,486.17

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1.5x scale

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.