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Finding the Fourth Proportional to 72,406.20, 108,617.40 and 22,485.90

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Solution

The fourth proportional to 72,406.20, 108,617.40 and 22,485.90 is: 33,731.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,406.20 : 108,617.40 = 22,485.90 : x
  2. Step 2: Convert to fraction form
    72,406.20/108,617.40 = 22,485.90/x
  3. Step 3: Cross multiply
    72,406.20x = 108,617.40 × 22,485.90
  4. Step 4: Simplify right side
    72,406.20x = 2,442,359,994.66
  5. Step 5: Solve for x
    x = 2,442,359,994.66/72,406.20
  6. Step 6: Final answer
    x = 33,731.37

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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.