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Finding the Fourth Proportional to 72,630.28, 108,987.18 and 30,506.68

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Solution

The fourth proportional to 72,630.28, 108,987.18 and 30,506.68 is: 45,777.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,630.28 : 108,987.18 = 30,506.68 : x
  2. Step 2: Convert to fraction form
    72,630.28/108,987.18 = 30,506.68/x
  3. Step 3: Cross multiply
    72,630.28x = 108,987.18 × 30,506.68
  4. Step 4: Simplify right side
    72,630.28x = 3,324,837,024.36
  5. Step 5: Solve for x
    x = 3,324,837,024.36/72,630.28
  6. Step 6: Final answer
    x = 45,777.56

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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.