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Finding the Fourth Proportional to 49,995.20, 74,992.80 and 20,393.60

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Solution

The fourth proportional to 49,995.20, 74,992.80 and 20,393.60 is: 30,590.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,995.20 : 74,992.80 = 20,393.60 : x
  2. Step 2: Convert to fraction form
    49,995.20/74,992.80 = 20,393.60/x
  3. Step 3: Cross multiply
    49,995.20x = 74,992.80 × 20,393.60
  4. Step 4: Simplify right side
    49,995.20x = 1,529,373,166.08
  5. Step 5: Solve for x
    x = 1,529,373,166.08/49,995.20
  6. Step 6: Final answer
    x = 30,590.40

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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.