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Finding the Fourth Proportional to 69,731.20, 104,443.20 and 60,515.20

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Solution

The fourth proportional to 69,731.20, 104,443.20 and 60,515.20 is: 90,639.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,731.20 : 104,443.20 = 60,515.20 : x
  2. Step 2: Convert to fraction form
    69,731.20/104,443.20 = 60,515.20/x
  3. Step 3: Cross multiply
    69,731.20x = 104,443.20 × 60,515.20
  4. Step 4: Simplify right side
    69,731.20x = 6,320,401,136.64
  5. Step 5: Solve for x
    x = 6,320,401,136.64/69,731.20
  6. Step 6: Final answer
    x = 90,639.50

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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.