Home / 85,731.82-128,795.36-82,188.94

Finding the Fourth Proportional to 85,731.82, 128,795.36 and 82,188.94

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Solution

The fourth proportional to 85,731.82, 128,795.36 and 82,188.94 is: 123,472.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,731.82 : 128,795.36 = 82,188.94 : x
  2. Step 2: Convert to fraction form
    85,731.82/128,795.36 = 82,188.94/x
  3. Step 3: Cross multiply
    85,731.82x = 128,795.36 × 82,188.94
  4. Step 4: Simplify right side
    85,731.82x = 10,585,554,115.32
  5. Step 5: Solve for x
    x = 10,585,554,115.32/85,731.82
  6. Step 6: Final answer
    x = 123,472.87

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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.