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Finding the Fourth Proportional to 103,435.75, 155,060.02 and 71,860.60

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Solution

The fourth proportional to 103,435.75, 155,060.02 and 71,860.60 is: 107,725.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,435.75 : 155,060.02 = 71,860.60 : x
  2. Step 2: Convert to fraction form
    103,435.75/155,060.02 = 71,860.60/x
  3. Step 3: Cross multiply
    103,435.75x = 155,060.02 × 71,860.60
  4. Step 4: Simplify right side
    103,435.75x = 11,142,706,073.21
  5. Step 5: Solve for x
    x = 11,142,706,073.21/103,435.75
  6. Step 6: Final answer
    x = 107,725.87

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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.