Home / 253,918.38-380,900.66-66,929.88

Finding the Fourth Proportional to 253,918.38, 380,900.66 and 66,929.88

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Solution

The fourth proportional to 253,918.38, 380,900.66 and 66,929.88 is: 100,400.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,918.38 : 380,900.66 = 66,929.88 : x
  2. Step 2: Convert to fraction form
    253,918.38/380,900.66 = 66,929.88/x
  3. Step 3: Cross multiply
    253,918.38x = 380,900.66 × 66,929.88
  4. Step 4: Simplify right side
    253,918.38x = 25,493,635,465.72
  5. Step 5: Solve for x
    x = 25,493,635,465.72/253,918.38
  6. Step 6: Final answer
    x = 100,400.91

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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.