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Finding the Fourth Proportional to 49,830.80, 74,741.34 and 20,250.40

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Solution

The fourth proportional to 49,830.80, 74,741.34 and 20,250.40 is: 30,373.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,830.80 : 74,741.34 = 20,250.40 : x
  2. Step 2: Convert to fraction form
    49,830.80/74,741.34 = 20,250.40/x
  3. Step 3: Cross multiply
    49,830.80x = 74,741.34 × 20,250.40
  4. Step 4: Simplify right side
    49,830.80x = 1,513,542,031.54
  5. Step 5: Solve for x
    x = 1,513,542,031.54/49,830.80
  6. Step 6: Final answer
    x = 30,373.62

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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.