Home / 131,402.89-197,228.85-81,331.51

Finding the Fourth Proportional to 131,402.89, 197,228.85 and 81,331.51

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Solution

The fourth proportional to 131,402.89, 197,228.85 and 81,331.51 is: 122,074.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,402.89 : 197,228.85 = 81,331.51 : x
  2. Step 2: Convert to fraction form
    131,402.89/197,228.85 = 81,331.51/x
  3. Step 3: Cross multiply
    131,402.89x = 197,228.85 × 81,331.51
  4. Step 4: Simplify right side
    131,402.89x = 16,040,920,186.06
  5. Step 5: Solve for x
    x = 16,040,920,186.06/131,402.89
  6. Step 6: Final answer
    x = 122,074.33

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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.