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Finding the Fourth Proportional to 72,626.36, 108,905.51 and 30,497.45

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Solution

The fourth proportional to 72,626.36, 108,905.51 and 30,497.45 is: 45,731.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,626.36 : 108,905.51 = 30,497.45 : x
  2. Step 2: Convert to fraction form
    72,626.36/108,905.51 = 30,497.45/x
  3. Step 3: Cross multiply
    72,626.36x = 108,905.51 × 30,497.45
  4. Step 4: Simplify right side
    72,626.36x = 3,321,339,877.67
  5. Step 5: Solve for x
    x = 3,321,339,877.67/72,626.36
  6. Step 6: Final answer
    x = 45,731.88

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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.