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Finding the Fourth Proportional to 128,736.95, 193,105.42 and 105,018.93

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Solution

The fourth proportional to 128,736.95, 193,105.42 and 105,018.93 is: 157,528.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,736.95 : 193,105.42 = 105,018.93 : x
  2. Step 2: Convert to fraction form
    128,736.95/193,105.42 = 105,018.93/x
  3. Step 3: Cross multiply
    128,736.95x = 193,105.42 × 105,018.93
  4. Step 4: Simplify right side
    128,736.95x = 20,279,724,323.05
  5. Step 5: Solve for x
    x = 20,279,724,323.05/128,736.95
  6. Step 6: Final answer
    x = 157,528.40

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1.5x scale

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.