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Finding the Fourth Proportional to 259,366.25, 388,955.79 and 109,618.13

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Solution

The fourth proportional to 259,366.25, 388,955.79 and 109,618.13 is: 164,387.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,366.25 : 388,955.79 = 109,618.13 : x
  2. Step 2: Convert to fraction form
    259,366.25/388,955.79 = 109,618.13/x
  3. Step 3: Cross multiply
    259,366.25x = 388,955.79 × 109,618.13
  4. Step 4: Simplify right side
    259,366.25x = 42,636,604,407.69
  5. Step 5: Solve for x
    x = 42,636,604,407.69/259,366.25
  6. Step 6: Final answer
    x = 164,387.64

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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.