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Finding the Fourth Proportional to 61,178.64, 91,713.60 and 21,730.56

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Solution

The fourth proportional to 61,178.64, 91,713.60 and 21,730.56 is: 32,576.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,178.64 : 91,713.60 = 21,730.56 : x
  2. Step 2: Convert to fraction form
    61,178.64/91,713.60 = 21,730.56/x
  3. Step 3: Cross multiply
    61,178.64x = 91,713.60 × 21,730.56
  4. Step 4: Simplify right side
    61,178.64x = 1,992,987,887.62
  5. Step 5: Solve for x
    x = 1,992,987,887.62/61,178.64
  6. Step 6: Final answer
    x = 32,576.53

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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.