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Finding the Fourth Proportional to 60,672.88, 91,022.28 and 21,231.28

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Solution

The fourth proportional to 60,672.88, 91,022.28 and 21,231.28 is: 31,851.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,672.88 : 91,022.28 = 21,231.28 : x
  2. Step 2: Convert to fraction form
    60,672.88/91,022.28 = 21,231.28/x
  3. Step 3: Cross multiply
    60,672.88x = 91,022.28 × 21,231.28
  4. Step 4: Simplify right side
    60,672.88x = 1,932,519,512.92
  5. Step 5: Solve for x
    x = 1,932,519,512.92/60,672.88
  6. Step 6: Final answer
    x = 31,851.46

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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.