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Finding the Fourth Proportional to 149,005.56, 205,627.71 and 81,937.56

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Solution

The fourth proportional to 149,005.56, 205,627.71 and 81,937.56 is: 113,073.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,005.56 : 205,627.71 = 81,937.56 : x
  2. Step 2: Convert to fraction form
    149,005.56/205,627.71 = 81,937.56/x
  3. Step 3: Cross multiply
    149,005.56x = 205,627.71 × 81,937.56
  4. Step 4: Simplify right side
    149,005.56x = 16,848,632,825.79
  5. Step 5: Solve for x
    x = 16,848,632,825.79/149,005.56
  6. Step 6: Final answer
    x = 113,073.85

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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.