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Finding the Fourth Proportional to 74,662.56, 111,924.72 and 25,380

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Solution

The fourth proportional to 74,662.56, 111,924.72 and 25,380 is: 38,046.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,662.56 : 111,924.72 = 25,380 : x
  2. Step 2: Convert to fraction form
    74,662.56/111,924.72 = 25,380/x
  3. Step 3: Cross multiply
    74,662.56x = 111,924.72 × 25,380
  4. Step 4: Simplify right side
    74,662.56x = 2,840,649,393.60
  5. Step 5: Solve for x
    x = 2,840,649,393.60/74,662.56
  6. Step 6: Final answer
    x = 38,046.50

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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.