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Finding the Fourth Proportional to 91,774.96, 137,704.56 and 54,409.12

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Solution

The fourth proportional to 91,774.96, 137,704.56 and 54,409.12 is: 81,638.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,774.96 : 137,704.56 = 54,409.12 : x
  2. Step 2: Convert to fraction form
    91,774.96/137,704.56 = 54,409.12/x
  3. Step 3: Cross multiply
    91,774.96x = 137,704.56 × 54,409.12
  4. Step 4: Simplify right side
    91,774.96x = 7,492,383,929.59
  5. Step 5: Solve for x
    x = 7,492,383,929.59/91,774.96
  6. Step 6: Final answer
    x = 81,638.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.