Home / 149,372.54-206,131.51-81,390.07

Finding the Fourth Proportional to 149,372.54, 206,131.51 and 81,390.07

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Solution

The fourth proportional to 149,372.54, 206,131.51 and 81,390.07 is: 112,316.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,372.54 : 206,131.51 = 81,390.07 : x
  2. Step 2: Convert to fraction form
    149,372.54/206,131.51 = 81,390.07/x
  3. Step 3: Cross multiply
    149,372.54x = 206,131.51 × 81,390.07
  4. Step 4: Simplify right side
    149,372.54x = 16,777,058,028.11
  5. Step 5: Solve for x
    x = 16,777,058,028.11/149,372.54
  6. Step 6: Final answer
    x = 112,316.88

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1.5x scale

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.