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Finding the Fourth Proportional to 139,440.72, 209,163.24 and 44,688.72

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Solution

The fourth proportional to 139,440.72, 209,163.24 and 44,688.72 is: 67,033.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,440.72 : 209,163.24 = 44,688.72 : x
  2. Step 2: Convert to fraction form
    139,440.72/209,163.24 = 44,688.72/x
  3. Step 3: Cross multiply
    139,440.72x = 209,163.24 × 44,688.72
  4. Step 4: Simplify right side
    139,440.72x = 9,347,237,466.65
  5. Step 5: Solve for x
    x = 9,347,237,466.65/139,440.72
  6. Step 6: Final answer
    x = 67,033.77

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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.