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Finding the Fourth Proportional to 101,676.25, 140,318.22 and 61,389.28

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Solution

The fourth proportional to 101,676.25, 140,318.22 and 61,389.28 is: 84,720.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,676.25 : 140,318.22 = 61,389.28 : x
  2. Step 2: Convert to fraction form
    101,676.25/140,318.22 = 61,389.28/x
  3. Step 3: Cross multiply
    101,676.25x = 140,318.22 × 61,389.28
  4. Step 4: Simplify right side
    101,676.25x = 8,614,034,496.68
  5. Step 5: Solve for x
    x = 8,614,034,496.68/101,676.25
  6. Step 6: Final answer
    x = 84,720.22

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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.