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Finding the Fourth Proportional to 103,653.17, 155,786.49 and 85,998.36

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Solution

The fourth proportional to 103,653.17, 155,786.49 and 85,998.36 is: 129,252.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,653.17 : 155,786.49 = 85,998.36 : x
  2. Step 2: Convert to fraction form
    103,653.17/155,786.49 = 85,998.36/x
  3. Step 3: Cross multiply
    103,653.17x = 155,786.49 × 85,998.36
  4. Step 4: Simplify right side
    103,653.17x = 13,397,382,358.06
  5. Step 5: Solve for x
    x = 13,397,382,358.06/103,653.17
  6. Step 6: Final answer
    x = 129,252.03

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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.