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Finding the Fourth Proportional to 154,563.90, 213,306.20 and 86,576.90

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Solution

The fourth proportional to 154,563.90, 213,306.20 and 86,576.90 is: 119,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,563.90 : 213,306.20 = 86,576.90 : x
  2. Step 2: Convert to fraction form
    154,563.90/213,306.20 = 86,576.90/x
  3. Step 3: Cross multiply
    154,563.90x = 213,306.20 × 86,576.90
  4. Step 4: Simplify right side
    154,563.90x = 18,467,388,047.36
  5. Step 5: Solve for x
    x = 18,467,388,047.36/154,563.90
  6. Step 6: Final answer
    x = 119,480.60

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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.