Home / 81,720.26-112,778.80-61,541.54

Finding the Fourth Proportional to 81,720.26, 112,778.80 and 61,541.54

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Solution

The fourth proportional to 81,720.26, 112,778.80 and 61,541.54 is: 84,930.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.26 : 112,778.80 = 61,541.54 : x
  2. Step 2: Convert to fraction form
    81,720.26/112,778.80 = 61,541.54/x
  3. Step 3: Cross multiply
    81,720.26x = 112,778.80 × 61,541.54
  4. Step 4: Simplify right side
    81,720.26x = 6,940,581,031.35
  5. Step 5: Solve for x
    x = 6,940,581,031.35/81,720.26
  6. Step 6: Final answer
    x = 84,930.97

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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.