Home / 85,815.67-128,721.88-26,650.03

Finding the Fourth Proportional to 85,815.67, 128,721.88 and 26,650.03

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Solution

The fourth proportional to 85,815.67, 128,721.88 and 26,650.03 is: 39,974.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,815.67 : 128,721.88 = 26,650.03 : x
  2. Step 2: Convert to fraction form
    85,815.67/128,721.88 = 26,650.03/x
  3. Step 3: Cross multiply
    85,815.67x = 128,721.88 × 26,650.03
  4. Step 4: Simplify right side
    85,815.67x = 3,430,441,963.66
  5. Step 5: Solve for x
    x = 3,430,441,963.66/85,815.67
  6. Step 6: Final answer
    x = 39,974.54

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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.