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Finding the Fourth Proportional to 60,682.78, 91,017.69 and 21,240.64

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Solution

The fourth proportional to 60,682.78, 91,017.69 and 21,240.64 is: 31,858.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,682.78 : 91,017.69 = 21,240.64 : x
  2. Step 2: Convert to fraction form
    60,682.78/91,017.69 = 21,240.64/x
  3. Step 3: Cross multiply
    60,682.78x = 91,017.69 × 21,240.64
  4. Step 4: Simplify right side
    60,682.78x = 1,933,273,986.92
  5. Step 5: Solve for x
    x = 1,933,273,986.92/60,682.78
  6. Step 6: Final answer
    x = 31,858.69

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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.