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Finding the Fourth Proportional to 221,657.61, 305,895.06 and 131,091.21

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Solution

The fourth proportional to 221,657.61, 305,895.06 and 131,091.21 is: 180,910.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,657.61 : 305,895.06 = 131,091.21 : x
  2. Step 2: Convert to fraction form
    221,657.61/305,895.06 = 131,091.21/x
  3. Step 3: Cross multiply
    221,657.61x = 305,895.06 × 131,091.21
  4. Step 4: Simplify right side
    221,657.61x = 40,100,153,548.42
  5. Step 5: Solve for x
    x = 40,100,153,548.42/221,657.61
  6. Step 6: Final answer
    x = 180,910.34

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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.