Home / 61,139.09-84,378.97-40,720.03

Finding the Fourth Proportional to 61,139.09, 84,378.97 and 40,720.03

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Solution

The fourth proportional to 61,139.09, 84,378.97 and 40,720.03 is: 56,198.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,139.09 : 84,378.97 = 40,720.03 : x
  2. Step 2: Convert to fraction form
    61,139.09/84,378.97 = 40,720.03/x
  3. Step 3: Cross multiply
    61,139.09x = 84,378.97 × 40,720.03
  4. Step 4: Simplify right side
    61,139.09x = 3,435,914,029.72
  5. Step 5: Solve for x
    x = 3,435,914,029.72/61,139.09
  6. Step 6: Final answer
    x = 56,198.32

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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.