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Finding the Fourth Proportional to 89,361.20, 134,041.80 and 54,311.60

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Solution

The fourth proportional to 89,361.20, 134,041.80 and 54,311.60 is: 81,467.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,361.20 : 134,041.80 = 54,311.60 : x
  2. Step 2: Convert to fraction form
    89,361.20/134,041.80 = 54,311.60/x
  3. Step 3: Cross multiply
    89,361.20x = 134,041.80 × 54,311.60
  4. Step 4: Simplify right side
    89,361.20x = 7,280,024,624.88
  5. Step 5: Solve for x
    x = 7,280,024,624.88/89,361.20
  6. Step 6: Final answer
    x = 81,467.40

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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.