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Finding the Fourth Proportional to 235,485.90, 324,856.28 and 139,924.94

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Solution

The fourth proportional to 235,485.90, 324,856.28 and 139,924.94 is: 193,028.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,485.90 : 324,856.28 = 139,924.94 : x
  2. Step 2: Convert to fraction form
    235,485.90/324,856.28 = 139,924.94/x
  3. Step 3: Cross multiply
    235,485.90x = 324,856.28 × 139,924.94
  4. Step 4: Simplify right side
    235,485.90x = 45,455,494,213.15
  5. Step 5: Solve for x
    x = 45,455,494,213.15/235,485.90
  6. Step 6: Final answer
    x = 193,028.52

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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.