Home / 85,743.67-128,634.30-28,815.53

Finding the Fourth Proportional to 85,743.67, 128,634.30 and 28,815.53

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Solution

The fourth proportional to 85,743.67, 128,634.30 and 28,815.53 is: 43,229.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,743.67 : 128,634.30 = 28,815.53 : x
  2. Step 2: Convert to fraction form
    85,743.67/128,634.30 = 28,815.53/x
  3. Step 3: Cross multiply
    85,743.67x = 128,634.30 × 28,815.53
  4. Step 4: Simplify right side
    85,743.67x = 3,706,665,852.26
  5. Step 5: Solve for x
    x = 3,706,665,852.26/85,743.67
  6. Step 6: Final answer
    x = 43,229.62

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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.