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Finding the Fourth Proportional to 81,693.85, 122,540.87 and 25,534.25

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Solution

The fourth proportional to 81,693.85, 122,540.87 and 25,534.25 is: 38,301.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,693.85 : 122,540.87 = 25,534.25 : x
  2. Step 2: Convert to fraction form
    81,693.85/122,540.87 = 25,534.25/x
  3. Step 3: Cross multiply
    81,693.85x = 122,540.87 × 25,534.25
  4. Step 4: Simplify right side
    81,693.85x = 3,128,989,209.80
  5. Step 5: Solve for x
    x = 3,128,989,209.80/81,693.85
  6. Step 6: Final answer
    x = 38,301.40

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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.