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Finding the Fourth Proportional to 103,422.30, 155,133.45 and 73,241.70

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Solution

The fourth proportional to 103,422.30, 155,133.45 and 73,241.70 is: 109,862.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,422.30 : 155,133.45 = 73,241.70 : x
  2. Step 2: Convert to fraction form
    103,422.30/155,133.45 = 73,241.70/x
  3. Step 3: Cross multiply
    103,422.30x = 155,133.45 × 73,241.70
  4. Step 4: Simplify right side
    103,422.30x = 11,362,237,604.87
  5. Step 5: Solve for x
    x = 11,362,237,604.87/103,422.30
  6. Step 6: Final answer
    x = 109,862.55

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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.