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Finding the Fourth Proportional to 66,570.19, 91,867.20 and 36,355.51

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Solution

The fourth proportional to 66,570.19, 91,867.20 and 36,355.51 is: 50,170.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,570.19 : 91,867.20 = 36,355.51 : x
  2. Step 2: Convert to fraction form
    66,570.19/91,867.20 = 36,355.51/x
  3. Step 3: Cross multiply
    66,570.19x = 91,867.20 × 36,355.51
  4. Step 4: Simplify right side
    66,570.19x = 3,339,878,781.77
  5. Step 5: Solve for x
    x = 3,339,878,781.77/66,570.19
  6. Step 6: Final answer
    x = 50,170.79

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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.