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Finding the Fourth Proportional to 259,243.51, 388,863.43 and 72,255.01

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Solution

The fourth proportional to 259,243.51, 388,863.43 and 72,255.01 is: 108,382.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,243.51 : 388,863.43 = 72,255.01 : x
  2. Step 2: Convert to fraction form
    259,243.51/388,863.43 = 72,255.01/x
  3. Step 3: Cross multiply
    259,243.51x = 388,863.43 × 72,255.01
  4. Step 4: Simplify right side
    259,243.51x = 28,097,331,023.28
  5. Step 5: Solve for x
    x = 28,097,331,023.28/259,243.51
  6. Step 6: Final answer
    x = 108,382.00

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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.