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Finding the Fourth Proportional to 83,851.79, 115,720.20 and 48,047.76

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Solution

The fourth proportional to 83,851.79, 115,720.20 and 48,047.76 is: 66,308.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,851.79 : 115,720.20 = 48,047.76 : x
  2. Step 2: Convert to fraction form
    83,851.79/115,720.20 = 48,047.76/x
  3. Step 3: Cross multiply
    83,851.79x = 115,720.20 × 48,047.76
  4. Step 4: Simplify right side
    83,851.79x = 5,560,096,396.75
  5. Step 5: Solve for x
    x = 5,560,096,396.75/83,851.79
  6. Step 6: Final answer
    x = 66,308.62

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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.