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Finding the Fourth Proportional to 189,753.81, 284,400.51 and 139,366.67

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Solution

The fourth proportional to 189,753.81, 284,400.51 and 139,366.67 is: 208,880.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,753.81 : 284,400.51 = 139,366.67 : x
  2. Step 2: Convert to fraction form
    189,753.81/284,400.51 = 139,366.67/x
  3. Step 3: Cross multiply
    189,753.81x = 284,400.51 × 139,366.67
  4. Step 4: Simplify right side
    189,753.81x = 39,635,950,603.00
  5. Step 5: Solve for x
    x = 39,635,950,603.00/189,753.81
  6. Step 6: Final answer
    x = 208,880.92

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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.