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Finding the Fourth Proportional to 352,394.61, 528,587.19 and 86,157.42

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Solution

The fourth proportional to 352,394.61, 528,587.19 and 86,157.42 is: 129,234.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,394.61 : 528,587.19 = 86,157.42 : x
  2. Step 2: Convert to fraction form
    352,394.61/528,587.19 = 86,157.42/x
  3. Step 3: Cross multiply
    352,394.61x = 528,587.19 × 86,157.42
  4. Step 4: Simplify right side
    352,394.61x = 45,541,708,535.45
  5. Step 5: Solve for x
    x = 45,541,708,535.45/352,394.61
  6. Step 6: Final answer
    x = 129,234.97

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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.