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Finding the Fourth Proportional to 128,576.88, 192,729.24 and 58,505.40

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Solution

The fourth proportional to 128,576.88, 192,729.24 and 58,505.40 is: 87,696.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,576.88 : 192,729.24 = 58,505.40 : x
  2. Step 2: Convert to fraction form
    128,576.88/192,729.24 = 58,505.40/x
  3. Step 3: Cross multiply
    128,576.88x = 192,729.24 × 58,505.40
  4. Step 4: Simplify right side
    128,576.88x = 11,275,701,277.90
  5. Step 5: Solve for x
    x = 11,275,701,277.90/128,576.88
  6. Step 6: Final answer
    x = 87,696.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.