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Finding the Fourth Proportional to 74,253.60, 111,056.40 and 66,412.80

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Solution

The fourth proportional to 74,253.60, 111,056.40 and 66,412.80 is: 99,329.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,253.60 : 111,056.40 = 66,412.80 : x
  2. Step 2: Convert to fraction form
    74,253.60/111,056.40 = 66,412.80/x
  3. Step 3: Cross multiply
    74,253.60x = 111,056.40 × 66,412.80
  4. Step 4: Simplify right side
    74,253.60x = 7,375,566,481.92
  5. Step 5: Solve for x
    x = 7,375,566,481.92/74,253.60
  6. Step 6: Final answer
    x = 99,329.41

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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.