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Finding the Fourth Proportional to 219,390.75, 329,086.14 and 53,178.75

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Solution

The fourth proportional to 219,390.75, 329,086.14 and 53,178.75 is: 79,768.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,390.75 : 329,086.14 = 53,178.75 : x
  2. Step 2: Convert to fraction form
    219,390.75/329,086.14 = 53,178.75/x
  3. Step 3: Cross multiply
    219,390.75x = 329,086.14 × 53,178.75
  4. Step 4: Simplify right side
    219,390.75x = 17,500,389,567.53
  5. Step 5: Solve for x
    x = 17,500,389,567.53/219,390.75
  6. Step 6: Final answer
    x = 79,768.13

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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.