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Finding the Fourth Proportional to 92,789.93, 139,184.91 and 53,321.87

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Solution

The fourth proportional to 92,789.93, 139,184.91 and 53,321.87 is: 79,982.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,789.93 : 139,184.91 = 53,321.87 : x
  2. Step 2: Convert to fraction form
    92,789.93/139,184.91 = 53,321.87/x
  3. Step 3: Cross multiply
    92,789.93x = 139,184.91 × 53,321.87
  4. Step 4: Simplify right side
    92,789.93x = 7,421,598,981.06
  5. Step 5: Solve for x
    x = 7,421,598,981.06/92,789.93
  6. Step 6: Final answer
    x = 79,982.81

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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.