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Finding the Fourth Proportional to 69,141.70, 103,639.65 and 39,495.70

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Solution

The fourth proportional to 69,141.70, 103,639.65 and 39,495.70 is: 59,201.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,141.70 : 103,639.65 = 39,495.70 : x
  2. Step 2: Convert to fraction form
    69,141.70/103,639.65 = 39,495.70/x
  3. Step 3: Cross multiply
    69,141.70x = 103,639.65 × 39,495.70
  4. Step 4: Simplify right side
    69,141.70x = 4,093,320,524.51
  5. Step 5: Solve for x
    x = 4,093,320,524.51/69,141.70
  6. Step 6: Final answer
    x = 59,201.91

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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.