Home / 221,520.36-305,591.67-145,005.78

Finding the Fourth Proportional to 221,520.36, 305,591.67 and 145,005.78

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Solution

The fourth proportional to 221,520.36, 305,591.67 and 145,005.78 is: 200,038.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,520.36 : 305,591.67 = 145,005.78 : x
  2. Step 2: Convert to fraction form
    221,520.36/305,591.67 = 145,005.78/x
  3. Step 3: Cross multiply
    221,520.36x = 305,591.67 × 145,005.78
  4. Step 4: Simplify right side
    221,520.36x = 44,312,558,469.85
  5. Step 5: Solve for x
    x = 44,312,558,469.85/221,520.36
  6. Step 6: Final answer
    x = 200,038.31

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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.