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Finding the Fourth Proportional to 72,620.49, 108,930.81 and 22,700.85

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Solution

The fourth proportional to 72,620.49, 108,930.81 and 22,700.85 is: 34,051.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,620.49 : 108,930.81 = 22,700.85 : x
  2. Step 2: Convert to fraction form
    72,620.49/108,930.81 = 22,700.85/x
  3. Step 3: Cross multiply
    72,620.49x = 108,930.81 × 22,700.85
  4. Step 4: Simplify right side
    72,620.49x = 2,472,821,978.19
  5. Step 5: Solve for x
    x = 2,472,821,978.19/72,620.49
  6. Step 6: Final answer
    x = 34,051.30

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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.