Home / 85,865.10-128,761.20-41,505.45

Finding the Fourth Proportional to 85,865.10, 128,761.20 and 41,505.45

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Solution

The fourth proportional to 85,865.10, 128,761.20 and 41,505.45 is: 62,240.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,865.10 : 128,761.20 = 41,505.45 : x
  2. Step 2: Convert to fraction form
    85,865.10/128,761.20 = 41,505.45/x
  3. Step 3: Cross multiply
    85,865.10x = 128,761.20 × 41,505.45
  4. Step 4: Simplify right side
    85,865.10x = 5,344,291,548.54
  5. Step 5: Solve for x
    x = 5,344,291,548.54/85,865.10
  6. Step 6: Final answer
    x = 62,240.56

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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.