Home / 120,286.16-180,069.75-72,757.42

Finding the Fourth Proportional to 120,286.16, 180,069.75 and 72,757.42

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Solution

The fourth proportional to 120,286.16, 180,069.75 and 72,757.42 is: 108,918.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,286.16 : 180,069.75 = 72,757.42 : x
  2. Step 2: Convert to fraction form
    120,286.16/180,069.75 = 72,757.42/x
  3. Step 3: Cross multiply
    120,286.16x = 180,069.75 × 72,757.42
  4. Step 4: Simplify right side
    120,286.16x = 13,101,409,979.87
  5. Step 5: Solve for x
    x = 13,101,409,979.87/120,286.16
  6. Step 6: Final answer
    x = 108,918.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.