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Finding the Fourth Proportional to 66,511.36, 91,786.80 and 37,830.34

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Solution

The fourth proportional to 66,511.36, 91,786.80 and 37,830.34 is: 52,206.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,511.36 : 91,786.80 = 37,830.34 : x
  2. Step 2: Convert to fraction form
    66,511.36/91,786.80 = 37,830.34/x
  3. Step 3: Cross multiply
    66,511.36x = 91,786.80 × 37,830.34
  4. Step 4: Simplify right side
    66,511.36x = 3,472,325,851.51
  5. Step 5: Solve for x
    x = 3,472,325,851.51/66,511.36
  6. Step 6: Final answer
    x = 52,206.51

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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.