Home / 76,428.33-114,639.40-38,987.58

Finding the Fourth Proportional to 76,428.33, 114,639.40 and 38,987.58

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Solution

The fourth proportional to 76,428.33, 114,639.40 and 38,987.58 is: 58,479.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,428.33 : 114,639.40 = 38,987.58 : x
  2. Step 2: Convert to fraction form
    76,428.33/114,639.40 = 38,987.58/x
  3. Step 3: Cross multiply
    76,428.33x = 114,639.40 × 38,987.58
  4. Step 4: Simplify right side
    76,428.33x = 4,469,512,778.65
  5. Step 5: Solve for x
    x = 4,469,512,778.65/76,428.33
  6. Step 6: Final answer
    x = 58,479.79

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1.5x scale

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.