Home / 221,247.36-305,323.20-120,645.12

Finding the Fourth Proportional to 221,247.36, 305,323.20 and 120,645.12

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Solution

The fourth proportional to 221,247.36, 305,323.20 and 120,645.12 is: 166,491.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,247.36 : 305,323.20 = 120,645.12 : x
  2. Step 2: Convert to fraction form
    221,247.36/305,323.20 = 120,645.12/x
  3. Step 3: Cross multiply
    221,247.36x = 305,323.20 × 120,645.12
  4. Step 4: Simplify right side
    221,247.36x = 36,835,754,102.78
  5. Step 5: Solve for x
    x = 36,835,754,102.78/221,247.36
  6. Step 6: Final answer
    x = 166,491.27

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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.