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Finding the Fourth Proportional to 96,940.80, 145,410.93 and 30,381.21

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Solution

The fourth proportional to 96,940.80, 145,410.93 and 30,381.21 is: 45,571.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,940.80 : 145,410.93 = 30,381.21 : x
  2. Step 2: Convert to fraction form
    96,940.80/145,410.93 = 30,381.21/x
  3. Step 3: Cross multiply
    96,940.80x = 145,410.93 × 30,381.21
  4. Step 4: Simplify right side
    96,940.80x = 4,417,760,000.63
  5. Step 5: Solve for x
    x = 4,417,760,000.63/96,940.80
  6. Step 6: Final answer
    x = 45,571.73

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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.