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Finding the Fourth Proportional to 72,650.41, 108,981.92 and 20,059.93

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Solution

The fourth proportional to 72,650.41, 108,981.92 and 20,059.93 is: 30,091.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,650.41 : 108,981.92 = 20,059.93 : x
  2. Step 2: Convert to fraction form
    72,650.41/108,981.92 = 20,059.93/x
  3. Step 3: Cross multiply
    72,650.41x = 108,981.92 × 20,059.93
  4. Step 4: Simplify right side
    72,650.41x = 2,186,169,586.17
  5. Step 5: Solve for x
    x = 2,186,169,586.17/72,650.41
  6. Step 6: Final answer
    x = 30,091.63

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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.