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Finding the Fourth Proportional to 216,918.51, 325,470.86 and 83,892.11

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Solution

The fourth proportional to 216,918.51, 325,470.86 and 83,892.11 is: 125,874.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,918.51 : 325,470.86 = 83,892.11 : x
  2. Step 2: Convert to fraction form
    216,918.51/325,470.86 = 83,892.11/x
  3. Step 3: Cross multiply
    216,918.51x = 325,470.86 × 83,892.11
  4. Step 4: Simplify right side
    216,918.51x = 27,304,435,456.70
  5. Step 5: Solve for x
    x = 27,304,435,456.70/216,918.51
  6. Step 6: Final answer
    x = 125,874.16

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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.