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Finding the Fourth Proportional to 129,600.64, 178,857.12 and 97,713.28

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Solution

The fourth proportional to 129,600.64, 178,857.12 and 97,713.28 is: 134,850.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,600.64 : 178,857.12 = 97,713.28 : x
  2. Step 2: Convert to fraction form
    129,600.64/178,857.12 = 97,713.28/x
  3. Step 3: Cross multiply
    129,600.64x = 178,857.12 × 97,713.28
  4. Step 4: Simplify right side
    129,600.64x = 17,476,715,846.55
  5. Step 5: Solve for x
    x = 17,476,715,846.55/129,600.64
  6. Step 6: Final answer
    x = 134,850.54

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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.