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Finding the Fourth Proportional to 171,623.80, 257,435.70 and 115,636.60

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Solution

The fourth proportional to 171,623.80, 257,435.70 and 115,636.60 is: 173,454.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,623.80 : 257,435.70 = 115,636.60 : x
  2. Step 2: Convert to fraction form
    171,623.80/257,435.70 = 115,636.60/x
  3. Step 3: Cross multiply
    171,623.80x = 257,435.70 × 115,636.60
  4. Step 4: Simplify right side
    171,623.80x = 29,768,989,066.62
  5. Step 5: Solve for x
    x = 29,768,989,066.62/171,623.80
  6. Step 6: Final answer
    x = 173,454.90

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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.