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Finding the Fourth Proportional to 111,570.90, 154,027.89 and 86,021.21

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Solution

The fourth proportional to 111,570.90, 154,027.89 and 86,021.21 is: 118,755.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,570.90 : 154,027.89 = 86,021.21 : x
  2. Step 2: Convert to fraction form
    111,570.90/154,027.89 = 86,021.21/x
  3. Step 3: Cross multiply
    111,570.90x = 154,027.89 × 86,021.21
  4. Step 4: Simplify right side
    111,570.90x = 13,249,664,701.41
  5. Step 5: Solve for x
    x = 13,249,664,701.41/111,570.90
  6. Step 6: Final answer
    x = 118,755.56

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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.