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Finding the Fourth Proportional to 113,615.10, 156,770.40 and 65,859.12

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Solution

The fourth proportional to 113,615.10, 156,770.40 and 65,859.12 is: 90,874.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,615.10 : 156,770.40 = 65,859.12 : x
  2. Step 2: Convert to fraction form
    113,615.10/156,770.40 = 65,859.12/x
  3. Step 3: Cross multiply
    113,615.10x = 156,770.40 × 65,859.12
  4. Step 4: Simplify right side
    113,615.10x = 10,324,760,586.05
  5. Step 5: Solve for x
    x = 10,324,760,586.05/113,615.10
  6. Step 6: Final answer
    x = 90,874.90

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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.