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Finding the Fourth Proportional to 139,187.16, 208,678.50 and 44,362.80

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Solution

The fourth proportional to 139,187.16, 208,678.50 and 44,362.80 is: 66,511.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,187.16 : 208,678.50 = 44,362.80 : x
  2. Step 2: Convert to fraction form
    139,187.16/208,678.50 = 44,362.80/x
  3. Step 3: Cross multiply
    139,187.16x = 208,678.50 × 44,362.80
  4. Step 4: Simplify right side
    139,187.16x = 9,257,562,559.80
  5. Step 5: Solve for x
    x = 9,257,562,559.80/139,187.16
  6. Step 6: Final answer
    x = 66,511.61

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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.