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Finding the Fourth Proportional to 259,053.29, 388,615.29 and 90,534.51

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Solution

The fourth proportional to 259,053.29, 388,615.29 and 90,534.51 is: 135,814.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,053.29 : 388,615.29 = 90,534.51 : x
  2. Step 2: Convert to fraction form
    259,053.29/388,615.29 = 90,534.51/x
  3. Step 3: Cross multiply
    259,053.29x = 388,615.29 × 90,534.51
  4. Step 4: Simplify right side
    259,053.29x = 35,183,094,858.66
  5. Step 5: Solve for x
    x = 35,183,094,858.66/259,053.29
  6. Step 6: Final answer
    x = 135,814.12

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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.