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Finding the Fourth Proportional to 60,211.60, 90,331.80 and 29,021.20

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Solution

The fourth proportional to 60,211.60, 90,331.80 and 29,021.20 is: 43,538.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,211.60 : 90,331.80 = 29,021.20 : x
  2. Step 2: Convert to fraction form
    60,211.60/90,331.80 = 29,021.20/x
  3. Step 3: Cross multiply
    60,211.60x = 90,331.80 × 29,021.20
  4. Step 4: Simplify right side
    60,211.60x = 2,621,537,234.16
  5. Step 5: Solve for x
    x = 2,621,537,234.16/60,211.60
  6. Step 6: Final answer
    x = 43,538.74

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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.