Home / 426,015.90-639,156.44-126,498.04

Finding the Fourth Proportional to 426,015.90, 639,156.44 and 126,498.04

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Solution

The fourth proportional to 426,015.90, 639,156.44 and 126,498.04 is: 189,786.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,015.90 : 639,156.44 = 126,498.04 : x
  2. Step 2: Convert to fraction form
    426,015.90/639,156.44 = 126,498.04/x
  3. Step 3: Cross multiply
    426,015.90x = 639,156.44 × 126,498.04
  4. Step 4: Simplify right side
    426,015.90x = 80,852,036,913.38
  5. Step 5: Solve for x
    x = 80,852,036,913.38/426,015.90
  6. Step 6: Final answer
    x = 189,786.43

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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.