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Finding the Fourth Proportional to 69,772.61, 104,651.13 and 19,175.51

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Solution

The fourth proportional to 69,772.61, 104,651.13 and 19,175.51 is: 28,761.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,772.61 : 104,651.13 = 19,175.51 : x
  2. Step 2: Convert to fraction form
    69,772.61/104,651.13 = 19,175.51/x
  3. Step 3: Cross multiply
    69,772.61x = 104,651.13 × 19,175.51
  4. Step 4: Simplify right side
    69,772.61x = 2,006,738,587.10
  5. Step 5: Solve for x
    x = 2,006,738,587.10/69,772.61
  6. Step 6: Final answer
    x = 28,761.12

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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.