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Finding the Fourth Proportional to 72,739.76, 108,906.48 and 39,340.16

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Solution

The fourth proportional to 72,739.76, 108,906.48 and 39,340.16 is: 58,900.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,739.76 : 108,906.48 = 39,340.16 : x
  2. Step 2: Convert to fraction form
    72,739.76/108,906.48 = 39,340.16/x
  3. Step 3: Cross multiply
    72,739.76x = 108,906.48 × 39,340.16
  4. Step 4: Simplify right side
    72,739.76x = 4,284,398,348.24
  5. Step 5: Solve for x
    x = 4,284,398,348.24/72,739.76
  6. Step 6: Final answer
    x = 58,900.36

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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.