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Finding the Fourth Proportional to 71,638.59, 98,859.28 and 39,806.67

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Solution

The fourth proportional to 71,638.59, 98,859.28 and 39,806.67 is: 54,932.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,638.59 : 98,859.28 = 39,806.67 : x
  2. Step 2: Convert to fraction form
    71,638.59/98,859.28 = 39,806.67/x
  3. Step 3: Cross multiply
    71,638.59x = 98,859.28 × 39,806.67
  4. Step 4: Simplify right side
    71,638.59x = 3,935,258,735.40
  5. Step 5: Solve for x
    x = 3,935,258,735.40/71,638.59
  6. Step 6: Final answer
    x = 54,932.11

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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.