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Finding the Fourth Proportional to 71,788.80, 107,686.40 and 27,436.80

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Solution

The fourth proportional to 71,788.80, 107,686.40 and 27,436.80 is: 41,156.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,788.80 : 107,686.40 = 27,436.80 : x
  2. Step 2: Convert to fraction form
    71,788.80/107,686.40 = 27,436.80/x
  3. Step 3: Cross multiply
    71,788.80x = 107,686.40 × 27,436.80
  4. Step 4: Simplify right side
    71,788.80x = 2,954,570,219.52
  5. Step 5: Solve for x
    x = 2,954,570,219.52/71,788.80
  6. Step 6: Final answer
    x = 41,156.42

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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.