Home / 219,137.40-328,742.36-76,945.72

Finding the Fourth Proportional to 219,137.40, 328,742.36 and 76,945.72

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Solution

The fourth proportional to 219,137.40, 328,742.36 and 76,945.72 is: 115,431.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,137.40 : 328,742.36 = 76,945.72 : x
  2. Step 2: Convert to fraction form
    219,137.40/328,742.36 = 76,945.72/x
  3. Step 3: Cross multiply
    219,137.40x = 328,742.36 × 76,945.72
  4. Step 4: Simplify right side
    219,137.40x = 25,295,317,584.70
  5. Step 5: Solve for x
    x = 25,295,317,584.70/219,137.40
  6. Step 6: Final answer
    x = 115,431.31

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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.