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Finding the Fourth Proportional to 103,909.11, 155,559.93 and 93,936.80

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Solution

The fourth proportional to 103,909.11, 155,559.93 and 93,936.80 is: 140,630.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,909.11 : 155,559.93 = 93,936.80 : x
  2. Step 2: Convert to fraction form
    103,909.11/155,559.93 = 93,936.80/x
  3. Step 3: Cross multiply
    103,909.11x = 155,559.93 × 93,936.80
  4. Step 4: Simplify right side
    103,909.11x = 14,612,801,254.62
  5. Step 5: Solve for x
    x = 14,612,801,254.62/103,909.11
  6. Step 6: Final answer
    x = 140,630.61

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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.