Home / 253,911.38-380,890.15-66,922.88

Finding the Fourth Proportional to 253,911.38, 380,890.15 and 66,922.88

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Solution

The fourth proportional to 253,911.38, 380,890.15 and 66,922.88 is: 100,390.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,911.38 : 380,890.15 = 66,922.88 : x
  2. Step 2: Convert to fraction form
    253,911.38/380,890.15 = 66,922.88/x
  3. Step 3: Cross multiply
    253,911.38x = 380,890.15 × 66,922.88
  4. Step 4: Simplify right side
    253,911.38x = 25,490,263,729.87
  5. Step 5: Solve for x
    x = 25,490,263,729.87/253,911.38
  6. Step 6: Final answer
    x = 100,390.40

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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.