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Finding the Fourth Proportional to 49,940.40, 74,921.20 and 18,775.92

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Solution

The fourth proportional to 49,940.40, 74,921.20 and 18,775.92 is: 28,167.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,940.40 : 74,921.20 = 18,775.92 : x
  2. Step 2: Convert to fraction form
    49,940.40/74,921.20 = 18,775.92/x
  3. Step 3: Cross multiply
    49,940.40x = 74,921.20 × 18,775.92
  4. Step 4: Simplify right side
    49,940.40x = 1,406,714,457.50
  5. Step 5: Solve for x
    x = 1,406,714,457.50/49,940.40
  6. Step 6: Final answer
    x = 28,167.87

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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.