Home / 81,649.15-122,442.64-48,378.60

Finding the Fourth Proportional to 81,649.15, 122,442.64 and 48,378.60

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Solution

The fourth proportional to 81,649.15, 122,442.64 and 48,378.60 is: 72,549.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,649.15 : 122,442.64 = 48,378.60 : x
  2. Step 2: Convert to fraction form
    81,649.15/122,442.64 = 48,378.60/x
  3. Step 3: Cross multiply
    81,649.15x = 122,442.64 × 48,378.60
  4. Step 4: Simplify right side
    81,649.15x = 5,923,603,382.56
  5. Step 5: Solve for x
    x = 5,923,603,382.56/81,649.15
  6. Step 6: Final answer
    x = 72,549.48

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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.