Home / 85,709.45-128,647.10-41,367.42

Finding the Fourth Proportional to 85,709.45, 128,647.10 and 41,367.42

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Solution

The fourth proportional to 85,709.45, 128,647.10 and 41,367.42 is: 62,091.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,709.45 : 128,647.10 = 41,367.42 : x
  2. Step 2: Convert to fraction form
    85,709.45/128,647.10 = 41,367.42/x
  3. Step 3: Cross multiply
    85,709.45x = 128,647.10 × 41,367.42
  4. Step 4: Simplify right side
    85,709.45x = 5,321,798,410.64
  5. Step 5: Solve for x
    x = 5,321,798,410.64/85,709.45
  6. Step 6: Final answer
    x = 62,091.15

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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.