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Finding the Fourth Proportional to 60,754.46, 91,128.45 and 21,315.56

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Solution

The fourth proportional to 60,754.46, 91,128.45 and 21,315.56 is: 31,972.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,754.46 : 91,128.45 = 21,315.56 : x
  2. Step 2: Convert to fraction form
    60,754.46/91,128.45 = 21,315.56/x
  3. Step 3: Cross multiply
    60,754.46x = 91,128.45 × 21,315.56
  4. Step 4: Simplify right side
    60,754.46x = 1,942,453,943.68
  5. Step 5: Solve for x
    x = 1,942,453,943.68/60,754.46
  6. Step 6: Final answer
    x = 31,972.20

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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.