Home / 76,815.16-115,213.02-30,100.84

Finding the Fourth Proportional to 76,815.16, 115,213.02 and 30,100.84

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Solution

The fourth proportional to 76,815.16, 115,213.02 and 30,100.84 is: 45,147.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,815.16 : 115,213.02 = 30,100.84 : x
  2. Step 2: Convert to fraction form
    76,815.16/115,213.02 = 30,100.84/x
  3. Step 3: Cross multiply
    76,815.16x = 115,213.02 × 30,100.84
  4. Step 4: Simplify right side
    76,815.16x = 3,468,008,680.94
  5. Step 5: Solve for x
    x = 3,468,008,680.94/76,815.16
  6. Step 6: Final answer
    x = 45,147.45

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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.