Home / 149,254.11-205,965.50-81,270

Finding the Fourth Proportional to 149,254.11, 205,965.50 and 81,270

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Solution

The fourth proportional to 149,254.11, 205,965.50 and 81,270 is: 112,149.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,254.11 : 205,965.50 = 81,270 : x
  2. Step 2: Convert to fraction form
    149,254.11/205,965.50 = 81,270/x
  3. Step 3: Cross multiply
    149,254.11x = 205,965.50 × 81,270
  4. Step 4: Simplify right side
    149,254.11x = 16,738,815,778.65
  5. Step 5: Solve for x
    x = 16,738,815,778.65/149,254.11
  6. Step 6: Final answer
    x = 112,149.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.