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Finding the Fourth Proportional to 67,274.52, 100,921.56 and 20,521.32

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Solution

The fourth proportional to 67,274.52, 100,921.56 and 20,521.32 is: 30,784.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,274.52 : 100,921.56 = 20,521.32 : x
  2. Step 2: Convert to fraction form
    67,274.52/100,921.56 = 20,521.32/x
  3. Step 3: Cross multiply
    67,274.52x = 100,921.56 × 20,521.32
  4. Step 4: Simplify right side
    67,274.52x = 2,071,043,627.66
  5. Step 5: Solve for x
    x = 2,071,043,627.66/67,274.52
  6. Step 6: Final answer
    x = 30,784.96

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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.