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Finding the Fourth Proportional to 66,511.64, 91,801.78 and 38,233.74

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Solution

The fourth proportional to 66,511.64, 91,801.78 and 38,233.74 is: 52,771.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,511.64 : 91,801.78 = 38,233.74 : x
  2. Step 2: Convert to fraction form
    66,511.64/91,801.78 = 38,233.74/x
  3. Step 3: Cross multiply
    66,511.64x = 91,801.78 × 38,233.74
  4. Step 4: Simplify right side
    66,511.64x = 3,509,925,388.06
  5. Step 5: Solve for x
    x = 3,509,925,388.06/66,511.64
  6. Step 6: Final answer
    x = 52,771.60

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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.