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Finding the Fourth Proportional to 100,868.20, 151,043.10 and 74,429.80

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Solution

The fourth proportional to 100,868.20, 151,043.10 and 74,429.80 is: 111,453.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,868.20 : 151,043.10 = 74,429.80 : x
  2. Step 2: Convert to fraction form
    100,868.20/151,043.10 = 74,429.80/x
  3. Step 3: Cross multiply
    100,868.20x = 151,043.10 × 74,429.80
  4. Step 4: Simplify right side
    100,868.20x = 11,242,107,724.38
  5. Step 5: Solve for x
    x = 11,242,107,724.38/100,868.20
  6. Step 6: Final answer
    x = 111,453.44

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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.