Home / 149,116.29-205,775.28-81,131.37

Finding the Fourth Proportional to 149,116.29, 205,775.28 and 81,131.37

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Solution

The fourth proportional to 149,116.29, 205,775.28 and 81,131.37 is: 111,958.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,116.29 : 205,775.28 = 81,131.37 : x
  2. Step 2: Convert to fraction form
    149,116.29/205,775.28 = 81,131.37/x
  3. Step 3: Cross multiply
    149,116.29x = 205,775.28 × 81,131.37
  4. Step 4: Simplify right side
    149,116.29x = 16,694,830,378.53
  5. Step 5: Solve for x
    x = 16,694,830,378.53/149,116.29
  6. Step 6: Final answer
    x = 111,958.46

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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.