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Finding the Fourth Proportional to 154,808.52, 213,638.20 and 86,840.60

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Solution

The fourth proportional to 154,808.52, 213,638.20 and 86,840.60 is: 119,841.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,808.52 : 213,638.20 = 86,840.60 : x
  2. Step 2: Convert to fraction form
    154,808.52/213,638.20 = 86,840.60/x
  3. Step 3: Cross multiply
    154,808.52x = 213,638.20 × 86,840.60
  4. Step 4: Simplify right side
    154,808.52x = 18,552,469,470.92
  5. Step 5: Solve for x
    x = 18,552,469,470.92/154,808.52
  6. Step 6: Final answer
    x = 119,841.40

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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.