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Finding the Fourth Proportional to 136,768.80, 205,201.80 and 66,601.20

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Solution

The fourth proportional to 136,768.80, 205,201.80 and 66,601.20 is: 99,925.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,768.80 : 205,201.80 = 66,601.20 : x
  2. Step 2: Convert to fraction form
    136,768.80/205,201.80 = 66,601.20/x
  3. Step 3: Cross multiply
    136,768.80x = 205,201.80 × 66,601.20
  4. Step 4: Simplify right side
    136,768.80x = 13,666,686,122.16
  5. Step 5: Solve for x
    x = 13,666,686,122.16/136,768.80
  6. Step 6: Final answer
    x = 99,925.47

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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.