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Finding the Fourth Proportional to 92,720.86, 139,087.16 and 35,821.90

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Solution

The fourth proportional to 92,720.86, 139,087.16 and 35,821.90 is: 53,735.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,720.86 : 139,087.16 = 35,821.90 : x
  2. Step 2: Convert to fraction form
    92,720.86/139,087.16 = 35,821.90/x
  3. Step 3: Cross multiply
    92,720.86x = 139,087.16 × 35,821.90
  4. Step 4: Simplify right side
    92,720.86x = 4,982,366,336.80
  5. Step 5: Solve for x
    x = 4,982,366,336.80/92,720.86
  6. Step 6: Final answer
    x = 53,735.12

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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.