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Finding the Fourth Proportional to 285,103.92, 427,531.32 and 135,387.12

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Solution

The fourth proportional to 285,103.92, 427,531.32 and 135,387.12 is: 203,021.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,103.92 : 427,531.32 = 135,387.12 : x
  2. Step 2: Convert to fraction form
    285,103.92/427,531.32 = 135,387.12/x
  3. Step 3: Cross multiply
    285,103.92x = 427,531.32 × 135,387.12
  4. Step 4: Simplify right side
    285,103.92x = 57,882,234,124.60
  5. Step 5: Solve for x
    x = 57,882,234,124.60/285,103.92
  6. Step 6: Final answer
    x = 203,021.53

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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.