Home / 258,429.40-387,759.30-118,115.80

Finding the Fourth Proportional to 258,429.40, 387,759.30 and 118,115.80

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Solution

The fourth proportional to 258,429.40, 387,759.30 and 118,115.80 is: 177,226.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,429.40 : 387,759.30 = 118,115.80 : x
  2. Step 2: Convert to fraction form
    258,429.40/387,759.30 = 118,115.80/x
  3. Step 3: Cross multiply
    258,429.40x = 387,759.30 × 118,115.80
  4. Step 4: Simplify right side
    258,429.40x = 45,800,499,926.94
  5. Step 5: Solve for x
    x = 45,800,499,926.94/258,429.40
  6. Step 6: Final answer
    x = 177,226.35

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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.