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Finding the Fourth Proportional to 66,512.34, 91,784.75 and 39,641.00

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Solution

The fourth proportional to 66,512.34, 91,784.75 and 39,641.00 is: 54,703.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,512.34 : 91,784.75 = 39,641.00 : x
  2. Step 2: Convert to fraction form
    66,512.34/91,784.75 = 39,641.00/x
  3. Step 3: Cross multiply
    66,512.34x = 91,784.75 × 39,641.00
  4. Step 4: Simplify right side
    66,512.34x = 3,638,438,617.62
  5. Step 5: Solve for x
    x = 3,638,438,617.62/66,512.34
  6. Step 6: Final answer
    x = 54,703.21

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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.