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Finding the Fourth Proportional to 111,408.67, 153,763.62 and 66,111.63

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Solution

The fourth proportional to 111,408.67, 153,763.62 and 66,111.63 is: 91,245.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,408.67 : 153,763.62 = 66,111.63 : x
  2. Step 2: Convert to fraction form
    111,408.67/153,763.62 = 66,111.63/x
  3. Step 3: Cross multiply
    111,408.67x = 153,763.62 × 66,111.63
  4. Step 4: Simplify right side
    111,408.67x = 10,165,563,552.90
  5. Step 5: Solve for x
    x = 10,165,563,552.90/111,408.67
  6. Step 6: Final answer
    x = 91,245.71

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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.