Home / 213,759.45-320,438.70-80,729.10

Finding the Fourth Proportional to 213,759.45, 320,438.70 and 80,729.10

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Solution

The fourth proportional to 213,759.45, 320,438.70 and 80,729.10 is: 121,017.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,759.45 : 320,438.70 = 80,729.10 : x
  2. Step 2: Convert to fraction form
    213,759.45/320,438.70 = 80,729.10/x
  3. Step 3: Cross multiply
    213,759.45x = 320,438.70 × 80,729.10
  4. Step 4: Simplify right side
    213,759.45x = 25,868,727,856.17
  5. Step 5: Solve for x
    x = 25,868,727,856.17/213,759.45
  6. Step 6: Final answer
    x = 121,017.94

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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.