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Finding the Fourth Proportional to 69,810.19, 104,684.22 and 19,878.95

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Solution

The fourth proportional to 69,810.19, 104,684.22 and 19,878.95 is: 29,809.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,810.19 : 104,684.22 = 19,878.95 : x
  2. Step 2: Convert to fraction form
    69,810.19/104,684.22 = 19,878.95/x
  3. Step 3: Cross multiply
    69,810.19x = 104,684.22 × 19,878.95
  4. Step 4: Simplify right side
    69,810.19x = 2,081,012,636.88
  5. Step 5: Solve for x
    x = 2,081,012,636.88/69,810.19
  6. Step 6: Final answer
    x = 29,809.58

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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.