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Finding the Fourth Proportional to 203,396.82, 280,653.17 and 135,515.04

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Solution

The fourth proportional to 203,396.82, 280,653.17 and 135,515.04 is: 186,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,396.82 : 280,653.17 = 135,515.04 : x
  2. Step 2: Convert to fraction form
    203,396.82/280,653.17 = 135,515.04/x
  3. Step 3: Cross multiply
    203,396.82x = 280,653.17 × 135,515.04
  4. Step 4: Simplify right side
    203,396.82x = 38,032,724,881.10
  5. Step 5: Solve for x
    x = 38,032,724,881.10/203,396.82
  6. Step 6: Final answer
    x = 186,987.80

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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.