Home / 149,388.12-206,153.73-81,408.06

Finding the Fourth Proportional to 149,388.12, 206,153.73 and 81,408.06

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Solution

The fourth proportional to 149,388.12, 206,153.73 and 81,408.06 is: 112,342.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,388.12 : 206,153.73 = 81,408.06 : x
  2. Step 2: Convert to fraction form
    149,388.12/206,153.73 = 81,408.06/x
  3. Step 3: Cross multiply
    149,388.12x = 206,153.73 × 81,408.06
  4. Step 4: Simplify right side
    149,388.12x = 16,782,575,221.06
  5. Step 5: Solve for x
    x = 16,782,575,221.06/149,388.12
  6. Step 6: Final answer
    x = 112,342.10

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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.