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Finding the Fourth Proportional to 271,361.76, 407,128.48 and 121,730.40

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Solution

The fourth proportional to 271,361.76, 407,128.48 and 121,730.40 is: 182,634.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,361.76 : 407,128.48 = 121,730.40 : x
  2. Step 2: Convert to fraction form
    271,361.76/407,128.48 = 121,730.40/x
  3. Step 3: Cross multiply
    271,361.76x = 407,128.48 × 121,730.40
  4. Step 4: Simplify right side
    271,361.76x = 49,559,912,721.79
  5. Step 5: Solve for x
    x = 49,559,912,721.79/271,361.76
  6. Step 6: Final answer
    x = 182,634.11

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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.