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Finding the Fourth Proportional to 69,228.81, 103,843.18 and 16,638.28

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Solution

The fourth proportional to 69,228.81, 103,843.18 and 16,638.28 is: 24,957.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,228.81 : 103,843.18 = 16,638.28 : x
  2. Step 2: Convert to fraction form
    69,228.81/103,843.18 = 16,638.28/x
  3. Step 3: Cross multiply
    69,228.81x = 103,843.18 × 16,638.28
  4. Step 4: Simplify right side
    69,228.81x = 1,727,771,666.12
  5. Step 5: Solve for x
    x = 1,727,771,666.12/69,228.81
  6. Step 6: Final answer
    x = 24,957.41

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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.