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Finding the Fourth Proportional to 50,000.20, 74,942.70 and 20,403.40

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Solution

The fourth proportional to 50,000.20, 74,942.70 and 20,403.40 is: 30,581.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,000.20 : 74,942.70 = 20,403.40 : x
  2. Step 2: Convert to fraction form
    50,000.20/74,942.70 = 20,403.40/x
  3. Step 3: Cross multiply
    50,000.20x = 74,942.70 × 20,403.40
  4. Step 4: Simplify right side
    50,000.20x = 1,529,085,885.18
  5. Step 5: Solve for x
    x = 1,529,085,885.18/50,000.20
  6. Step 6: Final answer
    x = 30,581.60

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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.