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Finding the Fourth Proportional to 72,953.44, 109,425.90 and 20,360.94

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Solution

The fourth proportional to 72,953.44, 109,425.90 and 20,360.94 is: 30,540.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,953.44 : 109,425.90 = 20,360.94 : x
  2. Step 2: Convert to fraction form
    72,953.44/109,425.90 = 20,360.94/x
  3. Step 3: Cross multiply
    72,953.44x = 109,425.90 × 20,360.94
  4. Step 4: Simplify right side
    72,953.44x = 2,228,014,184.35
  5. Step 5: Solve for x
    x = 2,228,014,184.35/72,953.44
  6. Step 6: Final answer
    x = 30,540.22

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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.