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Finding the Fourth Proportional to 66,205.35, 91,383.80 and 40,719.51

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Solution

The fourth proportional to 66,205.35, 91,383.80 and 40,719.51 is: 56,205.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,205.35 : 91,383.80 = 40,719.51 : x
  2. Step 2: Convert to fraction form
    66,205.35/91,383.80 = 40,719.51/x
  3. Step 3: Cross multiply
    66,205.35x = 91,383.80 × 40,719.51
  4. Step 4: Simplify right side
    66,205.35x = 3,721,103,354.34
  5. Step 5: Solve for x
    x = 3,721,103,354.34/66,205.35
  6. Step 6: Final answer
    x = 56,205.48

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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.