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Finding the Fourth Proportional to 220,744.71, 304,658.64 and 128,894.04

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Solution

The fourth proportional to 220,744.71, 304,658.64 and 128,894.04 is: 177,891.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,744.71 : 304,658.64 = 128,894.04 : x
  2. Step 2: Convert to fraction form
    220,744.71/304,658.64 = 128,894.04/x
  3. Step 3: Cross multiply
    220,744.71x = 304,658.64 × 128,894.04
  4. Step 4: Simplify right side
    220,744.71x = 39,268,682,930.51
  5. Step 5: Solve for x
    x = 39,268,682,930.51/220,744.71
  6. Step 6: Final answer
    x = 177,891.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.