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Finding the Fourth Proportional to 61,200.36, 91,815.12 and 21,760.92

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Solution

The fourth proportional to 61,200.36, 91,815.12 and 21,760.92 is: 32,646.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,200.36 : 91,815.12 = 21,760.92 : x
  2. Step 2: Convert to fraction form
    61,200.36/91,815.12 = 21,760.92/x
  3. Step 3: Cross multiply
    61,200.36x = 91,815.12 × 21,760.92
  4. Step 4: Simplify right side
    61,200.36x = 1,997,981,481.11
  5. Step 5: Solve for x
    x = 1,997,981,481.11/61,200.36
  6. Step 6: Final answer
    x = 32,646.56

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1.5x scale

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.