Home / 81,621.40-122,432.10-73,456.60

Finding the Fourth Proportional to 81,621.40, 122,432.10 and 73,456.60

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Solution

The fourth proportional to 81,621.40, 122,432.10 and 73,456.60 is: 110,184.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,621.40 : 122,432.10 = 73,456.60 : x
  2. Step 2: Convert to fraction form
    81,621.40/122,432.10 = 73,456.60/x
  3. Step 3: Cross multiply
    81,621.40x = 122,432.10 × 73,456.60
  4. Step 4: Simplify right side
    81,621.40x = 8,993,445,796.86
  5. Step 5: Solve for x
    x = 8,993,445,796.86/81,621.40
  6. Step 6: Final answer
    x = 110,184.90

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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.