Home / 231,989.11-320,139.64-135,186.80

Finding the Fourth Proportional to 231,989.11, 320,139.64 and 135,186.80

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Solution

The fourth proportional to 231,989.11, 320,139.64 and 135,186.80 is: 186,554.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,989.11 : 320,139.64 = 135,186.80 : x
  2. Step 2: Convert to fraction form
    231,989.11/320,139.64 = 135,186.80/x
  3. Step 3: Cross multiply
    231,989.11x = 320,139.64 × 135,186.80
  4. Step 4: Simplify right side
    231,989.11x = 43,278,653,484.75
  5. Step 5: Solve for x
    x = 43,278,653,484.75/231,989.11
  6. Step 6: Final answer
    x = 186,554.68

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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.