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Finding the Fourth Proportional to 259,171.71, 388,799.24 and 90,688.28

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Solution

The fourth proportional to 259,171.71, 388,799.24 and 90,688.28 is: 136,046.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,171.71 : 388,799.24 = 90,688.28 : x
  2. Step 2: Convert to fraction form
    259,171.71/388,799.24 = 90,688.28/x
  3. Step 3: Cross multiply
    259,171.71x = 388,799.24 × 90,688.28
  4. Step 4: Simplify right side
    259,171.71x = 35,259,531,943.47
  5. Step 5: Solve for x
    x = 35,259,531,943.47/259,171.71
  6. Step 6: Final answer
    x = 136,046.99

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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.