Home / 76,781.88-115,172.80-30,001.96

Finding the Fourth Proportional to 76,781.88, 115,172.80 and 30,001.96

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Solution

The fourth proportional to 76,781.88, 115,172.80 and 30,001.96 is: 45,002.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,781.88 : 115,172.80 = 30,001.96 : x
  2. Step 2: Convert to fraction form
    76,781.88/115,172.80 = 30,001.96/x
  3. Step 3: Cross multiply
    76,781.88x = 115,172.80 × 30,001.96
  4. Step 4: Simplify right side
    76,781.88x = 3,455,409,738.69
  5. Step 5: Solve for x
    x = 3,455,409,738.69/76,781.88
  6. Step 6: Final answer
    x = 45,002.93

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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.