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Finding the Fourth Proportional to 103,625.35, 155,668.43 and 100,860.55

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Solution

The fourth proportional to 103,625.35, 155,668.43 and 100,860.55 is: 151,515.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,625.35 : 155,668.43 = 100,860.55 : x
  2. Step 2: Convert to fraction form
    103,625.35/155,668.43 = 100,860.55/x
  3. Step 3: Cross multiply
    103,625.35x = 155,668.43 × 100,860.55
  4. Step 4: Simplify right side
    103,625.35x = 15,700,803,467.44
  5. Step 5: Solve for x
    x = 15,700,803,467.44/103,625.35
  6. Step 6: Final answer
    x = 151,515.08

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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.