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Finding the Fourth Proportional to 170,888.72, 256,385.01 and 121,065.21

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Solution

The fourth proportional to 170,888.72, 256,385.01 and 121,065.21 is: 181,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,888.72 : 256,385.01 = 121,065.21 : x
  2. Step 2: Convert to fraction form
    170,888.72/256,385.01 = 121,065.21/x
  3. Step 3: Cross multiply
    170,888.72x = 256,385.01 × 121,065.21
  4. Step 4: Simplify right side
    170,888.72x = 31,039,305,076.50
  5. Step 5: Solve for x
    x = 31,039,305,076.50/170,888.72
  6. Step 6: Final answer
    x = 181,634.60

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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.