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Finding the Fourth Proportional to 85,783.88, 118,372.20 and 49,966.40

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Solution

The fourth proportional to 85,783.88, 118,372.20 and 49,966.40 is: 68,948.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,783.88 : 118,372.20 = 49,966.40 : x
  2. Step 2: Convert to fraction form
    85,783.88/118,372.20 = 49,966.40/x
  3. Step 3: Cross multiply
    85,783.88x = 118,372.20 × 49,966.40
  4. Step 4: Simplify right side
    85,783.88x = 5,914,632,694.08
  5. Step 5: Solve for x
    x = 5,914,632,694.08/85,783.88
  6. Step 6: Final answer
    x = 68,948.07

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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.