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Finding the Fourth Proportional to 71,978.80, 107,935.80 and 27,590.80

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Solution

The fourth proportional to 71,978.80, 107,935.80 and 27,590.80 is: 41,373.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,978.80 : 107,935.80 = 27,590.80 : x
  2. Step 2: Convert to fraction form
    71,978.80/107,935.80 = 27,590.80/x
  3. Step 3: Cross multiply
    71,978.80x = 107,935.80 × 27,590.80
  4. Step 4: Simplify right side
    71,978.80x = 2,978,035,070.64
  5. Step 5: Solve for x
    x = 2,978,035,070.64/71,978.80
  6. Step 6: Final answer
    x = 41,373.78

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.