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Finding the Fourth Proportional to 69,175.90, 103,699.05 and 54,174.70

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Solution

The fourth proportional to 69,175.90, 103,699.05 and 54,174.70 is: 81,211.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,175.90 : 103,699.05 = 54,174.70 : x
  2. Step 2: Convert to fraction form
    69,175.90/103,699.05 = 54,174.70/x
  3. Step 3: Cross multiply
    69,175.90x = 103,699.05 × 54,174.70
  4. Step 4: Simplify right side
    69,175.90x = 5,617,864,924.04
  5. Step 5: Solve for x
    x = 5,617,864,924.04/69,175.90
  6. Step 6: Final answer
    x = 81,211.30

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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.