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Finding the Fourth Proportional to 153,589.82, 211,945.11 and 85,604.54

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Solution

The fourth proportional to 153,589.82, 211,945.11 and 85,604.54 is: 118,129.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,589.82 : 211,945.11 = 85,604.54 : x
  2. Step 2: Convert to fraction form
    153,589.82/211,945.11 = 85,604.54/x
  3. Step 3: Cross multiply
    153,589.82x = 211,945.11 × 85,604.54
  4. Step 4: Simplify right side
    153,589.82x = 18,143,463,646.80
  5. Step 5: Solve for x
    x = 18,143,463,646.80/153,589.82
  6. Step 6: Final answer
    x = 118,129.34

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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.