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Finding the Fourth Proportional to 103,921.20, 155,860.20 and 44,758.80

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Solution

The fourth proportional to 103,921.20, 155,860.20 and 44,758.80 is: 67,128.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,921.20 : 155,860.20 = 44,758.80 : x
  2. Step 2: Convert to fraction form
    103,921.20/155,860.20 = 44,758.80/x
  3. Step 3: Cross multiply
    103,921.20x = 155,860.20 × 44,758.80
  4. Step 4: Simplify right side
    103,921.20x = 6,976,115,519.76
  5. Step 5: Solve for x
    x = 6,976,115,519.76/103,921.20
  6. Step 6: Final answer
    x = 67,128.90

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1.5x scale

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.