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Finding the Fourth Proportional to 103,503.60, 155,255.40 and 68,074.20

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Solution

The fourth proportional to 103,503.60, 155,255.40 and 68,074.20 is: 102,111.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,503.60 : 155,255.40 = 68,074.20 : x
  2. Step 2: Convert to fraction form
    103,503.60/155,255.40 = 68,074.20/x
  3. Step 3: Cross multiply
    103,503.60x = 155,255.40 × 68,074.20
  4. Step 4: Simplify right side
    103,503.60x = 10,568,887,150.68
  5. Step 5: Solve for x
    x = 10,568,887,150.68/103,503.60
  6. Step 6: Final answer
    x = 102,111.30

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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.