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Finding the Fourth Proportional to 69,778.76, 104,712.54 and 25,401.20

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Solution

The fourth proportional to 69,778.76, 104,712.54 and 25,401.20 is: 38,117.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,778.76 : 104,712.54 = 25,401.20 : x
  2. Step 2: Convert to fraction form
    69,778.76/104,712.54 = 25,401.20/x
  3. Step 3: Cross multiply
    69,778.76x = 104,712.54 × 25,401.20
  4. Step 4: Simplify right side
    69,778.76x = 2,659,824,171.05
  5. Step 5: Solve for x
    x = 2,659,824,171.05/69,778.76
  6. Step 6: Final answer
    x = 38,117.96

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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.