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Finding the Fourth Proportional to 253,205.10, 379,807.65 and 66,216.60

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Solution

The fourth proportional to 253,205.10, 379,807.65 and 66,216.60 is: 99,324.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,205.10 : 379,807.65 = 66,216.60 : x
  2. Step 2: Convert to fraction form
    253,205.10/379,807.65 = 66,216.60/x
  3. Step 3: Cross multiply
    253,205.10x = 379,807.65 × 66,216.60
  4. Step 4: Simplify right side
    253,205.10x = 25,149,571,236.99
  5. Step 5: Solve for x
    x = 25,149,571,236.99/253,205.10
  6. Step 6: Final answer
    x = 99,324.90

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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.