Home / 130,515.12-195,765.96-76,509.78

Finding the Fourth Proportional to 130,515.12, 195,765.96 and 76,509.78

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Solution

The fourth proportional to 130,515.12, 195,765.96 and 76,509.78 is: 114,760.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,515.12 : 195,765.96 = 76,509.78 : x
  2. Step 2: Convert to fraction form
    130,515.12/195,765.96 = 76,509.78/x
  3. Step 3: Cross multiply
    130,515.12x = 195,765.96 × 76,509.78
  4. Step 4: Simplify right side
    130,515.12x = 14,978,010,531.09
  5. Step 5: Solve for x
    x = 14,978,010,531.09/130,515.12
  6. Step 6: Final answer
    x = 114,760.73

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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.