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Finding the Fourth Proportional to 61,209.60, 91,814.40 and 54,067.20

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Solution

The fourth proportional to 61,209.60, 91,814.40 and 54,067.20 is: 81,100.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,209.60 : 91,814.40 = 54,067.20 : x
  2. Step 2: Convert to fraction form
    61,209.60/91,814.40 = 54,067.20/x
  3. Step 3: Cross multiply
    61,209.60x = 91,814.40 × 54,067.20
  4. Step 4: Simplify right side
    61,209.60x = 4,964,147,527.68
  5. Step 5: Solve for x
    x = 4,964,147,527.68/61,209.60
  6. Step 6: Final answer
    x = 81,100.80

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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.