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Finding the Fourth Proportional to 74,431.80, 111,453.30 and 70,932.60

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Solution

The fourth proportional to 74,431.80, 111,453.30 and 70,932.60 is: 106,213.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,431.80 : 111,453.30 = 70,932.60 : x
  2. Step 2: Convert to fraction form
    74,431.80/111,453.30 = 70,932.60/x
  3. Step 3: Cross multiply
    74,431.80x = 111,453.30 × 70,932.60
  4. Step 4: Simplify right side
    74,431.80x = 7,905,672,347.58
  5. Step 5: Solve for x
    x = 7,905,672,347.58/74,431.80
  6. Step 6: Final answer
    x = 106,213.64

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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.