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Finding the Fourth Proportional to 103,676.12, 155,482.86 and 28,778.12

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Solution

The fourth proportional to 103,676.12, 155,482.86 and 28,778.12 is: 43,158.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,676.12 : 155,482.86 = 28,778.12 : x
  2. Step 2: Convert to fraction form
    103,676.12/155,482.86 = 28,778.12/x
  3. Step 3: Cross multiply
    103,676.12x = 155,482.86 × 28,778.12
  4. Step 4: Simplify right side
    103,676.12x = 4,474,504,403.02
  5. Step 5: Solve for x
    x = 4,474,504,403.02/103,676.12
  6. Step 6: Final answer
    x = 43,158.49

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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.