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Finding the Fourth Proportional to 139,716.30, 209,574.45 and 50,940.30

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Solution

The fourth proportional to 139,716.30, 209,574.45 and 50,940.30 is: 76,410.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,716.30 : 209,574.45 = 50,940.30 : x
  2. Step 2: Convert to fraction form
    139,716.30/209,574.45 = 50,940.30/x
  3. Step 3: Cross multiply
    139,716.30x = 209,574.45 × 50,940.30
  4. Step 4: Simplify right side
    139,716.30x = 10,675,785,355.34
  5. Step 5: Solve for x
    x = 10,675,785,355.34/139,716.30
  6. Step 6: Final answer
    x = 76,410.45

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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.