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Finding the Fourth Proportional to 81,622.80, 122,379.12 and 28,301.04

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Solution

The fourth proportional to 81,622.80, 122,379.12 and 28,301.04 is: 42,432.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,622.80 : 122,379.12 = 28,301.04 : x
  2. Step 2: Convert to fraction form
    81,622.80/122,379.12 = 28,301.04/x
  3. Step 3: Cross multiply
    81,622.80x = 122,379.12 × 28,301.04
  4. Step 4: Simplify right side
    81,622.80x = 3,463,456,370.28
  5. Step 5: Solve for x
    x = 3,463,456,370.28/81,622.80
  6. Step 6: Final answer
    x = 42,432.46

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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.