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Finding the Fourth Proportional to 74,287.64, 111,419.50 and 21,684.80

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Solution

The fourth proportional to 74,287.64, 111,419.50 and 21,684.80 is: 32,523.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,287.64 : 111,419.50 = 21,684.80 : x
  2. Step 2: Convert to fraction form
    74,287.64/111,419.50 = 21,684.80/x
  3. Step 3: Cross multiply
    74,287.64x = 111,419.50 × 21,684.80
  4. Step 4: Simplify right side
    74,287.64x = 2,416,109,573.60
  5. Step 5: Solve for x
    x = 2,416,109,573.60/74,287.64
  6. Step 6: Final answer
    x = 32,523.71

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1.5x scale

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.