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Finding the Fourth Proportional to 171,381.60, 257,072.40 and 115,394.40

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Solution

The fourth proportional to 171,381.60, 257,072.40 and 115,394.40 is: 173,091.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,381.60 : 257,072.40 = 115,394.40 : x
  2. Step 2: Convert to fraction form
    171,381.60/257,072.40 = 115,394.40/x
  3. Step 3: Cross multiply
    171,381.60x = 257,072.40 × 115,394.40
  4. Step 4: Simplify right side
    171,381.60x = 29,664,715,354.56
  5. Step 5: Solve for x
    x = 29,664,715,354.56/171,381.60
  6. Step 6: Final answer
    x = 173,091.60

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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.