Home / 231,991.12-320,142.40-135,188.80

Finding the Fourth Proportional to 231,991.12, 320,142.40 and 135,188.80

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Solution

The fourth proportional to 231,991.12, 320,142.40 and 135,188.80 is: 186,557.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,991.12 : 320,142.40 = 135,188.80 : x
  2. Step 2: Convert to fraction form
    231,991.12/320,142.40 = 135,188.80/x
  3. Step 3: Cross multiply
    231,991.12x = 320,142.40 × 135,188.80
  4. Step 4: Simplify right side
    231,991.12x = 43,279,666,885.12
  5. Step 5: Solve for x
    x = 43,279,666,885.12/231,991.12
  6. Step 6: Final answer
    x = 186,557.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.