Home / 149,372.40-206,131.40-81,390.18

Finding the Fourth Proportional to 149,372.40, 206,131.40 and 81,390.18

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Solution

The fourth proportional to 149,372.40, 206,131.40 and 81,390.18 is: 112,317.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,372.40 : 206,131.40 = 81,390.18 : x
  2. Step 2: Convert to fraction form
    149,372.40/206,131.40 = 81,390.18/x
  3. Step 3: Cross multiply
    149,372.40x = 206,131.40 × 81,390.18
  4. Step 4: Simplify right side
    149,372.40x = 16,777,071,749.65
  5. Step 5: Solve for x
    x = 16,777,071,749.65/149,372.40
  6. Step 6: Final answer
    x = 112,317.08

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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.