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Finding the Fourth Proportional to 171,397.92, 257,121.36 and 53,078.40

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Solution

The fourth proportional to 171,397.92, 257,121.36 and 53,078.40 is: 79,625.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,397.92 : 257,121.36 = 53,078.40 : x
  2. Step 2: Convert to fraction form
    171,397.92/257,121.36 = 53,078.40/x
  3. Step 3: Cross multiply
    171,397.92x = 257,121.36 × 53,078.40
  4. Step 4: Simplify right side
    171,397.92x = 13,647,590,394.62
  5. Step 5: Solve for x
    x = 13,647,590,394.62/171,397.92
  6. Step 6: Final answer
    x = 79,625.18

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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.