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Finding the Fourth Proportional to 154,000.70, 212,521.84 and 86,020.54

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Solution

The fourth proportional to 154,000.70, 212,521.84 and 86,020.54 is: 118,708.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,000.70 : 212,521.84 = 86,020.54 : x
  2. Step 2: Convert to fraction form
    154,000.70/212,521.84 = 86,020.54/x
  3. Step 3: Cross multiply
    154,000.70x = 212,521.84 × 86,020.54
  4. Step 4: Simplify right side
    154,000.70x = 18,281,242,375.98
  5. Step 5: Solve for x
    x = 18,281,242,375.98/154,000.70
  6. Step 6: Final answer
    x = 118,708.83

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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.