Home / 81,531.78-112,466.07-51,269.10

Finding the Fourth Proportional to 81,531.78, 112,466.07 and 51,269.10

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Solution

The fourth proportional to 81,531.78, 112,466.07 and 51,269.10 is: 70,721.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,531.78 : 112,466.07 = 51,269.10 : x
  2. Step 2: Convert to fraction form
    81,531.78/112,466.07 = 51,269.10/x
  3. Step 3: Cross multiply
    81,531.78x = 112,466.07 × 51,269.10
  4. Step 4: Simplify right side
    81,531.78x = 5,766,034,189.44
  5. Step 5: Solve for x
    x = 5,766,034,189.44/81,531.78
  6. Step 6: Final answer
    x = 70,721.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.