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Finding the Fourth Proportional to 69,559.58, 104,340.18 and 19,640.90

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Solution

The fourth proportional to 69,559.58, 104,340.18 and 19,640.90 is: 29,461.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,559.58 : 104,340.18 = 19,640.90 : x
  2. Step 2: Convert to fraction form
    69,559.58/104,340.18 = 19,640.90/x
  3. Step 3: Cross multiply
    69,559.58x = 104,340.18 × 19,640.90
  4. Step 4: Simplify right side
    69,559.58x = 2,049,335,041.36
  5. Step 5: Solve for x
    x = 2,049,335,041.36/69,559.58
  6. Step 6: Final answer
    x = 29,461.58

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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.