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Finding the Fourth Proportional to 103,898.97, 155,848.45 and 80,241.02

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Solution

The fourth proportional to 103,898.97, 155,848.45 and 80,241.02 is: 120,361.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,898.97 : 155,848.45 = 80,241.02 : x
  2. Step 2: Convert to fraction form
    103,898.97/155,848.45 = 80,241.02/x
  3. Step 3: Cross multiply
    103,898.97x = 155,848.45 × 80,241.02
  4. Step 4: Simplify right side
    103,898.97x = 12,505,438,348.46
  5. Step 5: Solve for x
    x = 12,505,438,348.46/103,898.97
  6. Step 6: Final answer
    x = 120,361.53

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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.