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Finding the Fourth Proportional to 72,939.36, 109,452.08 and 30,816.71

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Solution

The fourth proportional to 72,939.36, 109,452.08 and 30,816.71 is: 46,243.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,939.36 : 109,452.08 = 30,816.71 : x
  2. Step 2: Convert to fraction form
    72,939.36/109,452.08 = 30,816.71/x
  3. Step 3: Cross multiply
    72,939.36x = 109,452.08 × 30,816.71
  4. Step 4: Simplify right side
    72,939.36x = 3,372,952,538.04
  5. Step 5: Solve for x
    x = 3,372,952,538.04/72,939.36
  6. Step 6: Final answer
    x = 46,243.24

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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.