Home / 131,408.89-197,237.85-81,337.51

Finding the Fourth Proportional to 131,408.89, 197,237.85 and 81,337.51

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Solution

The fourth proportional to 131,408.89, 197,237.85 and 81,337.51 is: 122,083.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,408.89 : 197,237.85 = 81,337.51 : x
  2. Step 2: Convert to fraction form
    131,408.89/197,237.85 = 81,337.51/x
  3. Step 3: Cross multiply
    131,408.89x = 197,237.85 × 81,337.51
  4. Step 4: Simplify right side
    131,408.89x = 16,042,835,596.75
  5. Step 5: Solve for x
    x = 16,042,835,596.75/131,408.89
  6. Step 6: Final answer
    x = 122,083.34

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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.