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Finding the Fourth Proportional to 66,193.21, 91,347.54 and 35,978.51

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Solution

The fourth proportional to 66,193.21, 91,347.54 and 35,978.51 is: 49,650.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,193.21 : 91,347.54 = 35,978.51 : x
  2. Step 2: Convert to fraction form
    66,193.21/91,347.54 = 35,978.51/x
  3. Step 3: Cross multiply
    66,193.21x = 91,347.54 × 35,978.51
  4. Step 4: Simplify right side
    66,193.21x = 3,286,548,381.37
  5. Step 5: Solve for x
    x = 3,286,548,381.37/66,193.21
  6. Step 6: Final answer
    x = 49,650.84

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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.