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Finding the Fourth Proportional to 139,729.40, 209,594.10 and 133,605.80

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Solution

The fourth proportional to 139,729.40, 209,594.10 and 133,605.80 is: 200,408.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,729.40 : 209,594.10 = 133,605.80 : x
  2. Step 2: Convert to fraction form
    139,729.40/209,594.10 = 133,605.80/x
  3. Step 3: Cross multiply
    139,729.40x = 209,594.10 × 133,605.80
  4. Step 4: Simplify right side
    139,729.40x = 28,002,987,405.78
  5. Step 5: Solve for x
    x = 28,002,987,405.78/139,729.40
  6. Step 6: Final answer
    x = 200,408.70

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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.