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Finding the Fourth Proportional to 72,670.67, 109,006.05 and 20,080.20

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Solution

The fourth proportional to 72,670.67, 109,006.05 and 20,080.20 is: 30,120.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,670.67 : 109,006.05 = 20,080.20 : x
  2. Step 2: Convert to fraction form
    72,670.67/109,006.05 = 20,080.20/x
  3. Step 3: Cross multiply
    72,670.67x = 109,006.05 × 20,080.20
  4. Step 4: Simplify right side
    72,670.67x = 2,188,863,285.21
  5. Step 5: Solve for x
    x = 2,188,863,285.21/72,670.67
  6. Step 6: Final answer
    x = 30,120.31

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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.