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Finding the Fourth Proportional to 69,385.66, 104,078.49 and 39,740.20

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Solution

The fourth proportional to 69,385.66, 104,078.49 and 39,740.20 is: 59,610.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,385.66 : 104,078.49 = 39,740.20 : x
  2. Step 2: Convert to fraction form
    69,385.66/104,078.49 = 39,740.20/x
  3. Step 3: Cross multiply
    69,385.66x = 104,078.49 × 39,740.20
  4. Step 4: Simplify right side
    69,385.66x = 4,136,100,008.30
  5. Step 5: Solve for x
    x = 4,136,100,008.30/69,385.66
  6. Step 6: Final answer
    x = 59,610.30

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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.