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Finding the Fourth Proportional to 60,704.40, 91,040.40 and 21,257.40

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Solution

The fourth proportional to 60,704.40, 91,040.40 and 21,257.40 is: 31,880.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,704.40 : 91,040.40 = 21,257.40 : x
  2. Step 2: Convert to fraction form
    60,704.40/91,040.40 = 21,257.40/x
  3. Step 3: Cross multiply
    60,704.40x = 91,040.40 × 21,257.40
  4. Step 4: Simplify right side
    60,704.40x = 1,935,282,198.96
  5. Step 5: Solve for x
    x = 1,935,282,198.96/60,704.40
  6. Step 6: Final answer
    x = 31,880.43

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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.