Home / 135,780.86-187,247.40-81,324.30

Finding the Fourth Proportional to 135,780.86, 187,247.40 and 81,324.30

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Solution

The fourth proportional to 135,780.86, 187,247.40 and 81,324.30 is: 112,149.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,780.86 : 187,247.40 = 81,324.30 : x
  2. Step 2: Convert to fraction form
    135,780.86/187,247.40 = 81,324.30/x
  3. Step 3: Cross multiply
    135,780.86x = 187,247.40 × 81,324.30
  4. Step 4: Simplify right side
    135,780.86x = 15,227,764,129.03
  5. Step 5: Solve for x
    x = 15,227,764,129.03/135,780.86
  6. Step 6: Final answer
    x = 112,149.57

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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.