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Finding the Fourth Proportional to 136,683.78, 188,623.70 and 76,254.42

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Solution

The fourth proportional to 136,683.78, 188,623.70 and 76,254.42 is: 105,231.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,683.78 : 188,623.70 = 76,254.42 : x
  2. Step 2: Convert to fraction form
    136,683.78/188,623.70 = 76,254.42/x
  3. Step 3: Cross multiply
    136,683.78x = 188,623.70 × 76,254.42
  4. Step 4: Simplify right side
    136,683.78x = 14,383,390,841.75
  5. Step 5: Solve for x
    x = 14,383,390,841.75/136,683.78
  6. Step 6: Final answer
    x = 105,231.15

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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.