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Finding the Fourth Proportional to 122,005.80, 183,008.70 and 86,576.40

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Solution

The fourth proportional to 122,005.80, 183,008.70 and 86,576.40 is: 129,864.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,005.80 : 183,008.70 = 86,576.40 : x
  2. Step 2: Convert to fraction form
    122,005.80/183,008.70 = 86,576.40/x
  3. Step 3: Cross multiply
    122,005.80x = 183,008.70 × 86,576.40
  4. Step 4: Simplify right side
    122,005.80x = 15,844,234,414.68
  5. Step 5: Solve for x
    x = 15,844,234,414.68/122,005.80
  6. Step 6: Final answer
    x = 129,864.60

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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.