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Finding the Fourth Proportional to 278,955.25, 418,436.36 and 79,275.36

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Solution

The fourth proportional to 278,955.25, 418,436.36 and 79,275.36 is: 118,914.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,955.25 : 418,436.36 = 79,275.36 : x
  2. Step 2: Convert to fraction form
    278,955.25/418,436.36 = 79,275.36/x
  3. Step 3: Cross multiply
    278,955.25x = 418,436.36 × 79,275.36
  4. Step 4: Simplify right side
    278,955.25x = 33,171,694,992.06
  5. Step 5: Solve for x
    x = 33,171,694,992.06/278,955.25
  6. Step 6: Final answer
    x = 118,914.04

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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.