Home / 81,424.20-122,324.02-78,061.22

Finding the Fourth Proportional to 81,424.20, 122,324.02 and 78,061.22

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Solution

The fourth proportional to 81,424.20, 122,324.02 and 78,061.22 is: 117,271.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,424.20 : 122,324.02 = 78,061.22 : x
  2. Step 2: Convert to fraction form
    81,424.20/122,324.02 = 78,061.22/x
  3. Step 3: Cross multiply
    81,424.20x = 122,324.02 × 78,061.22
  4. Step 4: Simplify right side
    81,424.20x = 9,548,761,624.88
  5. Step 5: Solve for x
    x = 9,548,761,624.88/81,424.20
  6. Step 6: Final answer
    x = 117,271.79

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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.