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Finding the Fourth Proportional to 221,370.64, 331,886 and 114,640.72

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Solution

The fourth proportional to 221,370.64, 331,886 and 114,640.72 is: 171,873.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,370.64 : 331,886 = 114,640.72 : x
  2. Step 2: Convert to fraction form
    221,370.64/331,886 = 114,640.72/x
  3. Step 3: Cross multiply
    221,370.64x = 331,886 × 114,640.72
  4. Step 4: Simplify right side
    221,370.64x = 38,047,649,997.92
  5. Step 5: Solve for x
    x = 38,047,649,997.92/221,370.64
  6. Step 6: Final answer
    x = 171,873.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.