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Finding the Fourth Proportional to 67,322.40, 100,918.80 and 52,321.20

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Solution

The fourth proportional to 67,322.40, 100,918.80 and 52,321.20 is: 78,431.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,322.40 : 100,918.80 = 52,321.20 : x
  2. Step 2: Convert to fraction form
    67,322.40/100,918.80 = 52,321.20/x
  3. Step 3: Cross multiply
    67,322.40x = 100,918.80 × 52,321.20
  4. Step 4: Simplify right side
    67,322.40x = 5,280,192,718.56
  5. Step 5: Solve for x
    x = 5,280,192,718.56/67,322.40
  6. Step 6: Final answer
    x = 78,431.44

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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.