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Finding the Fourth Proportional to 92,855.90, 139,303.83 and 28,812.77

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Solution

The fourth proportional to 92,855.90, 139,303.83 and 28,812.77 is: 43,225.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,855.90 : 139,303.83 = 28,812.77 : x
  2. Step 2: Convert to fraction form
    92,855.90/139,303.83 = 28,812.77/x
  3. Step 3: Cross multiply
    92,855.90x = 139,303.83 × 28,812.77
  4. Step 4: Simplify right side
    92,855.90x = 4,013,728,744.23
  5. Step 5: Solve for x
    x = 4,013,728,744.23/92,855.90
  6. Step 6: Final answer
    x = 43,225.35

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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.