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Finding the Fourth Proportional to 171,409.01, 257,015.03 and 91,348.43

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Solution

The fourth proportional to 171,409.01, 257,015.03 and 91,348.43 is: 136,970.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,409.01 : 257,015.03 = 91,348.43 : x
  2. Step 2: Convert to fraction form
    171,409.01/257,015.03 = 91,348.43/x
  3. Step 3: Cross multiply
    171,409.01x = 257,015.03 × 91,348.43
  4. Step 4: Simplify right side
    171,409.01x = 23,477,917,735.09
  5. Step 5: Solve for x
    x = 23,477,917,735.09/171,409.01
  6. Step 6: Final answer
    x = 136,970.15

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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.