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Finding the Fourth Proportional to 171,372.60, 257,058.90 and 115,385.40

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Solution

The fourth proportional to 171,372.60, 257,058.90 and 115,385.40 is: 173,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,372.60 : 257,058.90 = 115,385.40 : x
  2. Step 2: Convert to fraction form
    171,372.60/257,058.90 = 115,385.40/x
  3. Step 3: Cross multiply
    171,372.60x = 257,058.90 × 115,385.40
  4. Step 4: Simplify right side
    171,372.60x = 29,660,844,000.06
  5. Step 5: Solve for x
    x = 29,660,844,000.06/171,372.60
  6. Step 6: Final answer
    x = 173,078.10

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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.