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Finding the Fourth Proportional to 139,597.17, 192,557.70 and 121,735.05

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Solution

The fourth proportional to 139,597.17, 192,557.70 and 121,735.05 is: 167,919.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,597.17 : 192,557.70 = 121,735.05 : x
  2. Step 2: Convert to fraction form
    139,597.17/192,557.70 = 121,735.05/x
  3. Step 3: Cross multiply
    139,597.17x = 192,557.70 × 121,735.05
  4. Step 4: Simplify right side
    139,597.17x = 23,441,021,237.39
  5. Step 5: Solve for x
    x = 23,441,021,237.39/139,597.17
  6. Step 6: Final answer
    x = 167,919.03

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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.