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Finding the Fourth Proportional to 136,586.80, 205,001.70 and 80,356.60

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Solution

The fourth proportional to 136,586.80, 205,001.70 and 80,356.60 is: 120,606.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,586.80 : 205,001.70 = 80,356.60 : x
  2. Step 2: Convert to fraction form
    136,586.80/205,001.70 = 80,356.60/x
  3. Step 3: Cross multiply
    136,586.80x = 205,001.70 × 80,356.60
  4. Step 4: Simplify right side
    136,586.80x = 16,473,239,606.22
  5. Step 5: Solve for x
    x = 16,473,239,606.22/136,586.80
  6. Step 6: Final answer
    x = 120,606.38

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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.