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Finding the Fourth Proportional to 61,067.68, 91,610.22 and 18,951.40

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Solution

The fourth proportional to 61,067.68, 91,610.22 and 18,951.40 is: 28,429.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,067.68 : 91,610.22 = 18,951.40 : x
  2. Step 2: Convert to fraction form
    61,067.68/91,610.22 = 18,951.40/x
  3. Step 3: Cross multiply
    61,067.68x = 91,610.22 × 18,951.40
  4. Step 4: Simplify right side
    61,067.68x = 1,736,141,966.75
  5. Step 5: Solve for x
    x = 1,736,141,966.75/61,067.68
  6. Step 6: Final answer
    x = 28,429.80

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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.