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Finding the Fourth Proportional to 69,043.84, 103,399.64 and 39,371.72

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Solution

The fourth proportional to 69,043.84, 103,399.64 and 39,371.72 is: 58,962.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,043.84 : 103,399.64 = 39,371.72 : x
  2. Step 2: Convert to fraction form
    69,043.84/103,399.64 = 39,371.72/x
  3. Step 3: Cross multiply
    69,043.84x = 103,399.64 × 39,371.72
  4. Step 4: Simplify right side
    69,043.84x = 4,071,021,674.18
  5. Step 5: Solve for x
    x = 4,071,021,674.18/69,043.84
  6. Step 6: Final answer
    x = 58,962.85

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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.