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Finding the Fourth Proportional to 219,828.04, 329,520.42 and 86,656.72

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Solution

The fourth proportional to 219,828.04, 329,520.42 and 86,656.72 is: 129,897.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,828.04 : 329,520.42 = 86,656.72 : x
  2. Step 2: Convert to fraction form
    219,828.04/329,520.42 = 86,656.72/x
  3. Step 3: Cross multiply
    219,828.04x = 329,520.42 × 86,656.72
  4. Step 4: Simplify right side
    219,828.04x = 28,555,158,770.22
  5. Step 5: Solve for x
    x = 28,555,158,770.22/219,828.04
  6. Step 6: Final answer
    x = 129,897.71

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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.