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Finding the Fourth Proportional to 139,585.55, 209,379.47 and 39,745.62

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Solution

The fourth proportional to 139,585.55, 209,379.47 and 39,745.62 is: 59,618.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,585.55 : 209,379.47 = 39,745.62 : x
  2. Step 2: Convert to fraction form
    139,585.55/209,379.47 = 39,745.62/x
  3. Step 3: Cross multiply
    139,585.55x = 209,379.47 × 39,745.62
  4. Step 4: Simplify right side
    139,585.55x = 8,321,916,651.69
  5. Step 5: Solve for x
    x = 8,321,916,651.69/139,585.55
  6. Step 6: Final answer
    x = 59,618.76

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1.5x scale

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.