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Finding the Fourth Proportional to 66,786.69, 100,156.95 and 19,388.92

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Solution

The fourth proportional to 66,786.69, 100,156.95 and 19,388.92 is: 29,076.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,786.69 : 100,156.95 = 19,388.92 : x
  2. Step 2: Convert to fraction form
    66,786.69/100,156.95 = 19,388.92/x
  3. Step 3: Cross multiply
    66,786.69x = 100,156.95 × 19,388.92
  4. Step 4: Simplify right side
    66,786.69x = 1,941,935,090.99
  5. Step 5: Solve for x
    x = 1,941,935,090.99/66,786.69
  6. Step 6: Final answer
    x = 29,076.68

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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.