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Finding the Fourth Proportional to 69,935.40, 105,012.45 and 40,410.90

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Solution

The fourth proportional to 69,935.40, 105,012.45 and 40,410.90 is: 60,679.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,935.40 : 105,012.45 = 40,410.90 : x
  2. Step 2: Convert to fraction form
    69,935.40/105,012.45 = 40,410.90/x
  3. Step 3: Cross multiply
    69,935.40x = 105,012.45 × 40,410.90
  4. Step 4: Simplify right side
    69,935.40x = 4,243,647,615.71
  5. Step 5: Solve for x
    x = 4,243,647,615.71/69,935.40
  6. Step 6: Final answer
    x = 60,679.54

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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.