Home / 231,971.21-320,105.11-136,459.45

Finding the Fourth Proportional to 231,971.21, 320,105.11 and 136,459.45

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Solution

The fourth proportional to 231,971.21, 320,105.11 and 136,459.45 is: 188,305.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,971.21 : 320,105.11 = 136,459.45 : x
  2. Step 2: Convert to fraction form
    231,971.21/320,105.11 = 136,459.45/x
  3. Step 3: Cross multiply
    231,971.21x = 320,105.11 × 136,459.45
  4. Step 4: Simplify right side
    231,971.21x = 43,681,367,252.79
  5. Step 5: Solve for x
    x = 43,681,367,252.79/231,971.21
  6. Step 6: Final answer
    x = 188,305.12

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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.