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Finding the Fourth Proportional to 111,571.90, 154,029.27 and 86,022.21

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Solution

The fourth proportional to 111,571.90, 154,029.27 and 86,022.21 is: 118,756.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,571.90 : 154,029.27 = 86,022.21 : x
  2. Step 2: Convert to fraction form
    111,571.90/154,029.27 = 86,022.21/x
  3. Step 3: Cross multiply
    111,571.90x = 154,029.27 × 86,022.21
  4. Step 4: Simplify right side
    111,571.90x = 13,249,938,210.09
  5. Step 5: Solve for x
    x = 13,249,938,210.09/111,571.90
  6. Step 6: Final answer
    x = 118,756.95

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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.