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Finding the Fourth Proportional to 139,944.20, 209,781.90 and 46,401.80

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Solution

The fourth proportional to 139,944.20, 209,781.90 and 46,401.80 is: 69,558.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,944.20 : 209,781.90 = 46,401.80 : x
  2. Step 2: Convert to fraction form
    139,944.20/209,781.90 = 46,401.80/x
  3. Step 3: Cross multiply
    139,944.20x = 209,781.90 × 46,401.80
  4. Step 4: Simplify right side
    139,944.20x = 9,734,257,767.42
  5. Step 5: Solve for x
    x = 9,734,257,767.42/139,944.20
  6. Step 6: Final answer
    x = 69,558.14

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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.