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Finding the Fourth Proportional to 48,921.60, 73,406.70 and 19,340.40

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Solution

The fourth proportional to 48,921.60, 73,406.70 and 19,340.40 is: 29,020.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,921.60 : 73,406.70 = 19,340.40 : x
  2. Step 2: Convert to fraction form
    48,921.60/73,406.70 = 19,340.40/x
  3. Step 3: Cross multiply
    48,921.60x = 73,406.70 × 19,340.40
  4. Step 4: Simplify right side
    48,921.60x = 1,419,714,940.68
  5. Step 5: Solve for x
    x = 1,419,714,940.68/48,921.60
  6. Step 6: Final answer
    x = 29,020.21

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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.