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Finding the Fourth Proportional to 74,568.60, 111,528.90 and 66,727.80

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Solution

The fourth proportional to 74,568.60, 111,528.90 and 66,727.80 is: 99,801.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,568.60 : 111,528.90 = 66,727.80 : x
  2. Step 2: Convert to fraction form
    74,568.60/111,528.90 = 66,727.80/x
  3. Step 3: Cross multiply
    74,568.60x = 111,528.90 × 66,727.80
  4. Step 4: Simplify right side
    74,568.60x = 7,442,078,133.42
  5. Step 5: Solve for x
    x = 7,442,078,133.42/74,568.60
  6. Step 6: Final answer
    x = 99,801.77

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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.