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Finding the Fourth Proportional to 77,363.88, 116,033.36 and 21,190.85

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Solution

The fourth proportional to 77,363.88, 116,033.36 and 21,190.85 is: 31,782.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,363.88 : 116,033.36 = 21,190.85 : x
  2. Step 2: Convert to fraction form
    77,363.88/116,033.36 = 21,190.85/x
  3. Step 3: Cross multiply
    77,363.88x = 116,033.36 × 21,190.85
  4. Step 4: Simplify right side
    77,363.88x = 2,458,845,236.67
  5. Step 5: Solve for x
    x = 2,458,845,236.67/77,363.88
  6. Step 6: Final answer
    x = 31,782.86

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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.