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Finding the Fourth Proportional to 139,806.61, 209,658.87 and 51,033.85

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Solution

The fourth proportional to 139,806.61, 209,658.87 and 51,033.85 is: 76,532.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,806.61 : 209,658.87 = 51,033.85 : x
  2. Step 2: Convert to fraction form
    139,806.61/209,658.87 = 51,033.85/x
  3. Step 3: Cross multiply
    139,806.61x = 209,658.87 × 51,033.85
  4. Step 4: Simplify right side
    139,806.61x = 10,699,698,798.60
  5. Step 5: Solve for x
    x = 10,699,698,798.60/139,806.61
  6. Step 6: Final answer
    x = 76,532.14

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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.