Home / 85,644.12-128,477.64-80,922.36

Finding the Fourth Proportional to 85,644.12, 128,477.64 and 80,922.36

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Solution

The fourth proportional to 85,644.12, 128,477.64 and 80,922.36 is: 121,394.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,644.12 : 128,477.64 = 80,922.36 : x
  2. Step 2: Convert to fraction form
    85,644.12/128,477.64 = 80,922.36/x
  3. Step 3: Cross multiply
    85,644.12x = 128,477.64 × 80,922.36
  4. Step 4: Simplify right side
    85,644.12x = 10,396,713,836.03
  5. Step 5: Solve for x
    x = 10,396,713,836.03/85,644.12
  6. Step 6: Final answer
    x = 121,394.37

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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.