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Finding the Fourth Proportional to 113,879.85, 157,173.42 and 66,160.88

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Solution

The fourth proportional to 113,879.85, 157,173.42 and 66,160.88 is: 91,313.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,879.85 : 157,173.42 = 66,160.88 : x
  2. Step 2: Convert to fraction form
    113,879.85/157,173.42 = 66,160.88/x
  3. Step 3: Cross multiply
    113,879.85x = 157,173.42 × 66,160.88
  4. Step 4: Simplify right side
    113,879.85x = 10,398,730,993.94
  5. Step 5: Solve for x
    x = 10,398,730,993.94/113,879.85
  6. Step 6: Final answer
    x = 91,313.18

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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.