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Finding the Fourth Proportional to 139,515.80, 209,273.70 and 133,610.90

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Solution

The fourth proportional to 139,515.80, 209,273.70 and 133,610.90 is: 200,416.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,515.80 : 209,273.70 = 133,610.90 : x
  2. Step 2: Convert to fraction form
    139,515.80/209,273.70 = 133,610.90/x
  3. Step 3: Cross multiply
    139,515.80x = 209,273.70 × 133,610.90
  4. Step 4: Simplify right side
    139,515.80x = 27,961,247,403.33
  5. Step 5: Solve for x
    x = 27,961,247,403.33/139,515.80
  6. Step 6: Final answer
    x = 200,416.35

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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.