Home / 149,147.80-205,828.28-81,169.16

Finding the Fourth Proportional to 149,147.80, 205,828.28 and 81,169.16

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Solution

The fourth proportional to 149,147.80, 205,828.28 and 81,169.16 is: 112,015.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,147.80 : 205,828.28 = 81,169.16 : x
  2. Step 2: Convert to fraction form
    149,147.80/205,828.28 = 81,169.16/x
  3. Step 3: Cross multiply
    149,147.80x = 205,828.28 × 81,169.16
  4. Step 4: Simplify right side
    149,147.80x = 16,706,908,591.84
  5. Step 5: Solve for x
    x = 16,706,908,591.84/149,147.80
  6. Step 6: Final answer
    x = 112,015.79

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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.