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Finding the Fourth Proportional to 73,120.96, 109,680.93 and 20,530.49

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Solution

The fourth proportional to 73,120.96, 109,680.93 and 20,530.49 is: 30,795.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,120.96 : 109,680.93 = 20,530.49 : x
  2. Step 2: Convert to fraction form
    73,120.96/109,680.93 = 20,530.49/x
  3. Step 3: Cross multiply
    73,120.96x = 109,680.93 × 20,530.49
  4. Step 4: Simplify right side
    73,120.96x = 2,251,803,133.90
  5. Step 5: Solve for x
    x = 2,251,803,133.90/73,120.96
  6. Step 6: Final answer
    x = 30,795.59

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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.