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Finding the Fourth Proportional to 72,405.20, 108,559.20 and 34,983.20

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Solution

The fourth proportional to 72,405.20, 108,559.20 and 34,983.20 is: 52,451.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,405.20 : 108,559.20 = 34,983.20 : x
  2. Step 2: Convert to fraction form
    72,405.20/108,559.20 = 34,983.20/x
  3. Step 3: Cross multiply
    72,405.20x = 108,559.20 × 34,983.20
  4. Step 4: Simplify right side
    72,405.20x = 3,797,748,205.44
  5. Step 5: Solve for x
    x = 3,797,748,205.44/72,405.20
  6. Step 6: Final answer
    x = 52,451.32

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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.