Home / 49,717.20-74,518.20-20,120.40

Finding the Fourth Proportional to 49,717.20, 74,518.20 and 20,120.40

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Solution

The fourth proportional to 49,717.20, 74,518.20 and 20,120.40 is: 30,157.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,717.20 : 74,518.20 = 20,120.40 : x
  2. Step 2: Convert to fraction form
    49,717.20/74,518.20 = 20,120.40/x
  3. Step 3: Cross multiply
    49,717.20x = 74,518.20 × 20,120.40
  4. Step 4: Simplify right side
    49,717.20x = 1,499,335,991.28
  5. Step 5: Solve for x
    x = 1,499,335,991.28/49,717.20
  6. Step 6: Final answer
    x = 30,157.29

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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.