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Finding the Fourth Proportional to 66,801.63, 100,178.81 and 19,406.86

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Solution

The fourth proportional to 66,801.63, 100,178.81 and 19,406.86 is: 29,103.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,801.63 : 100,178.81 = 19,406.86 : x
  2. Step 2: Convert to fraction form
    66,801.63/100,178.81 = 19,406.86/x
  3. Step 3: Cross multiply
    66,801.63x = 100,178.81 × 19,406.86
  4. Step 4: Simplify right side
    66,801.63x = 1,944,155,793.16
  5. Step 5: Solve for x
    x = 1,944,155,793.16/66,801.63
  6. Step 6: Final answer
    x = 29,103.42

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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.