Home / 319,716.80-479,398.86-130,128.50

Finding the Fourth Proportional to 319,716.80, 479,398.86 and 130,128.50

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Solution

The fourth proportional to 319,716.80, 479,398.86 and 130,128.50 is: 195,120.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,716.80 : 479,398.86 = 130,128.50 : x
  2. Step 2: Convert to fraction form
    319,716.80/479,398.86 = 130,128.50/x
  3. Step 3: Cross multiply
    319,716.80x = 479,398.86 × 130,128.50
  4. Step 4: Simplify right side
    319,716.80x = 62,383,454,553.51
  5. Step 5: Solve for x
    x = 62,383,454,553.51/319,716.80
  6. Step 6: Final answer
    x = 195,120.98

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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.