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Finding the Fourth Proportional to 203,503.15, 305,181.82 and 103,630.15

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Solution

The fourth proportional to 203,503.15, 305,181.82 and 103,630.15 is: 155,408.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,503.15 : 305,181.82 = 103,630.15 : x
  2. Step 2: Convert to fraction form
    203,503.15/305,181.82 = 103,630.15/x
  3. Step 3: Cross multiply
    203,503.15x = 305,181.82 × 103,630.15
  4. Step 4: Simplify right side
    203,503.15x = 31,626,037,783.87
  5. Step 5: Solve for x
    x = 31,626,037,783.87/203,503.15
  6. Step 6: Final answer
    x = 155,408.10

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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.