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Finding the Fourth Proportional to 72,654.45, 108,981.54 and 20,063.79

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Solution

The fourth proportional to 72,654.45, 108,981.54 and 20,063.79 is: 30,095.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,654.45 : 108,981.54 = 20,063.79 : x
  2. Step 2: Convert to fraction form
    72,654.45/108,981.54 = 20,063.79/x
  3. Step 3: Cross multiply
    72,654.45x = 108,981.54 × 20,063.79
  4. Step 4: Simplify right side
    72,654.45x = 2,186,582,732.44
  5. Step 5: Solve for x
    x = 2,186,582,732.44/72,654.45
  6. Step 6: Final answer
    x = 30,095.65

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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.