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Finding the Fourth Proportional to 69,207.52, 103,728.56 and 39,645.60

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Solution

The fourth proportional to 69,207.52, 103,728.56 and 39,645.60 is: 59,421.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,207.52 : 103,728.56 = 39,645.60 : x
  2. Step 2: Convert to fraction form
    69,207.52/103,728.56 = 39,645.60/x
  3. Step 3: Cross multiply
    69,207.52x = 103,728.56 × 39,645.60
  4. Step 4: Simplify right side
    69,207.52x = 4,112,380,998.34
  5. Step 5: Solve for x
    x = 4,112,380,998.34/69,207.52
  6. Step 6: Final answer
    x = 59,421.01

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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.