Home / 57,131.46-85,721.40-30,805.47

Finding the Fourth Proportional to 57,131.46, 85,721.40 and 30,805.47

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Solution

The fourth proportional to 57,131.46, 85,721.40 and 30,805.47 is: 46,221.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,131.46 : 85,721.40 = 30,805.47 : x
  2. Step 2: Convert to fraction form
    57,131.46/85,721.40 = 30,805.47/x
  3. Step 3: Cross multiply
    57,131.46x = 85,721.40 × 30,805.47
  4. Step 4: Simplify right side
    57,131.46x = 2,640,688,016.06
  5. Step 5: Solve for x
    x = 2,640,688,016.06/57,131.46
  6. Step 6: Final answer
    x = 46,221.26

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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.