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Finding the Fourth Proportional to 171,808.15, 257,231.39 and 129,556

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Solution

The fourth proportional to 171,808.15, 257,231.39 and 129,556 is: 193,971.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,808.15 : 257,231.39 = 129,556 : x
  2. Step 2: Convert to fraction form
    171,808.15/257,231.39 = 129,556/x
  3. Step 3: Cross multiply
    171,808.15x = 257,231.39 × 129,556
  4. Step 4: Simplify right side
    171,808.15x = 33,325,869,962.84
  5. Step 5: Solve for x
    x = 33,325,869,962.84/171,808.15
  6. Step 6: Final answer
    x = 193,971.41

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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.