Home / 85,429.73-128,121.12-25,455.51

Finding the Fourth Proportional to 85,429.73, 128,121.12 and 25,455.51

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Solution

The fourth proportional to 85,429.73, 128,121.12 and 25,455.51 is: 38,176.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,429.73 : 128,121.12 = 25,455.51 : x
  2. Step 2: Convert to fraction form
    85,429.73/128,121.12 = 25,455.51/x
  3. Step 3: Cross multiply
    85,429.73x = 128,121.12 × 25,455.51
  4. Step 4: Simplify right side
    85,429.73x = 3,261,388,451.37
  5. Step 5: Solve for x
    x = 3,261,388,451.37/85,429.73
  6. Step 6: Final answer
    x = 38,176.27

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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.