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Finding the Fourth Proportional to 113,414.50, 156,512.10 and 65,670.40

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Solution

The fourth proportional to 113,414.50, 156,512.10 and 65,670.40 is: 90,625.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,414.50 : 156,512.10 = 65,670.40 : x
  2. Step 2: Convert to fraction form
    113,414.50/156,512.10 = 65,670.40/x
  3. Step 3: Cross multiply
    113,414.50x = 156,512.10 × 65,670.40
  4. Step 4: Simplify right side
    113,414.50x = 10,278,212,211.84
  5. Step 5: Solve for x
    x = 10,278,212,211.84/113,414.50
  6. Step 6: Final answer
    x = 90,625.20

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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.