Home / 139,779.24-209,683.62-80,613.60

Finding the Fourth Proportional to 139,779.24, 209,683.62 and 80,613.60

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Solution

The fourth proportional to 139,779.24, 209,683.62 and 80,613.60 is: 120,928.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,779.24 : 209,683.62 = 80,613.60 : x
  2. Step 2: Convert to fraction form
    139,779.24/209,683.62 = 80,613.60/x
  3. Step 3: Cross multiply
    139,779.24x = 209,683.62 × 80,613.60
  4. Step 4: Simplify right side
    139,779.24x = 16,903,351,469.23
  5. Step 5: Solve for x
    x = 16,903,351,469.23/139,779.24
  6. Step 6: Final answer
    x = 120,928.91

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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.