Home / 149,372.75-206,131.95-81,390.53

Finding the Fourth Proportional to 149,372.75, 206,131.95 and 81,390.53

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Solution

The fourth proportional to 149,372.75, 206,131.95 and 81,390.53 is: 112,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,372.75 : 206,131.95 = 81,390.53 : x
  2. Step 2: Convert to fraction form
    149,372.75/206,131.95 = 81,390.53/x
  3. Step 3: Cross multiply
    149,372.75x = 206,131.95 × 81,390.53
  4. Step 4: Simplify right side
    149,372.75x = 16,777,187,629.77
  5. Step 5: Solve for x
    x = 16,777,187,629.77/149,372.75
  6. Step 6: Final answer
    x = 112,317.60

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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.