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Finding the Fourth Proportional to 48,325.72, 72,495.18 and 45,409.72

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Solution

The fourth proportional to 48,325.72, 72,495.18 and 45,409.72 is: 68,120.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,325.72 : 72,495.18 = 45,409.72 : x
  2. Step 2: Convert to fraction form
    48,325.72/72,495.18 = 45,409.72/x
  3. Step 3: Cross multiply
    48,325.72x = 72,495.18 × 45,409.72
  4. Step 4: Simplify right side
    48,325.72x = 3,291,985,825.15
  5. Step 5: Solve for x
    x = 3,291,985,825.15/48,325.72
  6. Step 6: Final answer
    x = 68,120.78

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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.