Home / 111,821.20-167,731.80-76,829.20

Finding the Fourth Proportional to 111,821.20, 167,731.80 and 76,829.20

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Solution

The fourth proportional to 111,821.20, 167,731.80 and 76,829.20 is: 115,243.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,821.20 : 167,731.80 = 76,829.20 : x
  2. Step 2: Convert to fraction form
    111,821.20/167,731.80 = 76,829.20/x
  3. Step 3: Cross multiply
    111,821.20x = 167,731.80 × 76,829.20
  4. Step 4: Simplify right side
    111,821.20x = 12,886,700,008.56
  5. Step 5: Solve for x
    x = 12,886,700,008.56/111,821.20
  6. Step 6: Final answer
    x = 115,243.80

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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.