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Finding the Fourth Proportional to 74,469.60, 111,934.80 and 73,087.20

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Solution

The fourth proportional to 74,469.60, 111,934.80 and 73,087.20 is: 109,856.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,469.60 : 111,934.80 = 73,087.20 : x
  2. Step 2: Convert to fraction form
    74,469.60/111,934.80 = 73,087.20/x
  3. Step 3: Cross multiply
    74,469.60x = 111,934.80 × 73,087.20
  4. Step 4: Simplify right side
    74,469.60x = 8,181,001,114.56
  5. Step 5: Solve for x
    x = 8,181,001,114.56/74,469.60
  6. Step 6: Final answer
    x = 109,856.92

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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.