Home / 221,369.46-305,513.34-135,378.72

Finding the Fourth Proportional to 221,369.46, 305,513.34 and 135,378.72

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Solution

The fourth proportional to 221,369.46, 305,513.34 and 135,378.72 is: 186,837.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,369.46 : 305,513.34 = 135,378.72 : x
  2. Step 2: Convert to fraction form
    221,369.46/305,513.34 = 135,378.72/x
  3. Step 3: Cross multiply
    221,369.46x = 305,513.34 × 135,378.72
  4. Step 4: Simplify right side
    221,369.46x = 41,360,004,912.12
  5. Step 5: Solve for x
    x = 41,360,004,912.12/221,369.46
  6. Step 6: Final answer
    x = 186,837.00

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1.5x scale

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.