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Finding the Fourth Proportional to 80,799.50, 121,218.70 and 25,395.50

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Solution

The fourth proportional to 80,799.50, 121,218.70 and 25,395.50 is: 38,099.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,799.50 : 121,218.70 = 25,395.50 : x
  2. Step 2: Convert to fraction form
    80,799.50/121,218.70 = 25,395.50/x
  3. Step 3: Cross multiply
    80,799.50x = 121,218.70 × 25,395.50
  4. Step 4: Simplify right side
    80,799.50x = 3,078,409,495.85
  5. Step 5: Solve for x
    x = 3,078,409,495.85/80,799.50
  6. Step 6: Final answer
    x = 38,099.36

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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.