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Finding the Fourth Proportional to 278,696.06, 418,064.92 and 79,032.52

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Solution

The fourth proportional to 278,696.06, 418,064.92 and 79,032.52 is: 118,554.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,696.06 : 418,064.92 = 79,032.52 : x
  2. Step 2: Convert to fraction form
    278,696.06/418,064.92 = 79,032.52/x
  3. Step 3: Cross multiply
    278,696.06x = 418,064.92 × 79,032.52
  4. Step 4: Simplify right side
    278,696.06x = 33,040,721,665.71
  5. Step 5: Solve for x
    x = 33,040,721,665.71/278,696.06
  6. Step 6: Final answer
    x = 118,554.68

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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.