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Finding the Fourth Proportional to 135,914.80, 203,872.20 and 42,408.40

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Solution

The fourth proportional to 135,914.80, 203,872.20 and 42,408.40 is: 63,612.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,914.80 : 203,872.20 = 42,408.40 : x
  2. Step 2: Convert to fraction form
    135,914.80/203,872.20 = 42,408.40/x
  3. Step 3: Cross multiply
    135,914.80x = 203,872.20 × 42,408.40
  4. Step 4: Simplify right side
    135,914.80x = 8,645,893,806.48
  5. Step 5: Solve for x
    x = 8,645,893,806.48/135,914.80
  6. Step 6: Final answer
    x = 63,612.60

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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.