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Finding the Fourth Proportional to 171,384.40, 256,961.40 and 91,435.60

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Solution

The fourth proportional to 171,384.40, 256,961.40 and 91,435.60 is: 137,091.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,384.40 : 256,961.40 = 91,435.60 : x
  2. Step 2: Convert to fraction form
    171,384.40/256,961.40 = 91,435.60/x
  3. Step 3: Cross multiply
    171,384.40x = 256,961.40 × 91,435.60
  4. Step 4: Simplify right side
    171,384.40x = 23,495,419,785.84
  5. Step 5: Solve for x
    x = 23,495,419,785.84/171,384.40
  6. Step 6: Final answer
    x = 137,091.94

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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.