Home / 219,308.45-328,992.77-77,121.18

Finding the Fourth Proportional to 219,308.45, 328,992.77 and 77,121.18

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Solution

The fourth proportional to 219,308.45, 328,992.77 and 77,121.18 is: 115,692.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,308.45 : 328,992.77 = 77,121.18 : x
  2. Step 2: Convert to fraction form
    219,308.45/328,992.77 = 77,121.18/x
  3. Step 3: Cross multiply
    219,308.45x = 328,992.77 × 77,121.18
  4. Step 4: Simplify right side
    219,308.45x = 25,372,310,826.67
  5. Step 5: Solve for x
    x = 25,372,310,826.67/219,308.45
  6. Step 6: Final answer
    x = 115,692.36

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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.