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Finding the Fourth Proportional to 221,271.75, 305,356.64 and 120,669.75

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Solution

The fourth proportional to 221,271.75, 305,356.64 and 120,669.75 is: 166,525.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,271.75 : 305,356.64 = 120,669.75 : x
  2. Step 2: Convert to fraction form
    221,271.75/305,356.64 = 120,669.75/x
  3. Step 3: Cross multiply
    221,271.75x = 305,356.64 × 120,669.75
  4. Step 4: Simplify right side
    221,271.75x = 36,847,308,806.29
  5. Step 5: Solve for x
    x = 36,847,308,806.29/221,271.75
  6. Step 6: Final answer
    x = 166,525.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.