Home / 81,619.80-122,429.70-48,442.20

Finding the Fourth Proportional to 81,619.80, 122,429.70 and 48,442.20

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Solution

The fourth proportional to 81,619.80, 122,429.70 and 48,442.20 is: 72,663.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,619.80 : 122,429.70 = 48,442.20 : x
  2. Step 2: Convert to fraction form
    81,619.80/122,429.70 = 48,442.20/x
  3. Step 3: Cross multiply
    81,619.80x = 122,429.70 × 48,442.20
  4. Step 4: Simplify right side
    81,619.80x = 5,930,764,013.34
  5. Step 5: Solve for x
    x = 5,930,764,013.34/81,619.80
  6. Step 6: Final answer
    x = 72,663.30

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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.