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Finding the Fourth Proportional to 260,937.09, 391,407.45 and 71,393.43

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Solution

The fourth proportional to 260,937.09, 391,407.45 and 71,393.43 is: 107,090.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,937.09 : 391,407.45 = 71,393.43 : x
  2. Step 2: Convert to fraction form
    260,937.09/391,407.45 = 71,393.43/x
  3. Step 3: Cross multiply
    260,937.09x = 391,407.45 × 71,393.43
  4. Step 4: Simplify right side
    260,937.09x = 27,943,920,383.05
  5. Step 5: Solve for x
    x = 27,943,920,383.05/260,937.09
  6. Step 6: Final answer
    x = 107,090.64

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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.