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Finding the Fourth Proportional to 73,260.40, 109,879.80 and 20,675.20

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Solution

The fourth proportional to 73,260.40, 109,879.80 and 20,675.20 is: 31,009.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,260.40 : 109,879.80 = 20,675.20 : x
  2. Step 2: Convert to fraction form
    73,260.40/109,879.80 = 20,675.20/x
  3. Step 3: Cross multiply
    73,260.40x = 109,879.80 × 20,675.20
  4. Step 4: Simplify right side
    73,260.40x = 2,271,786,840.96
  5. Step 5: Solve for x
    x = 2,271,786,840.96/73,260.40
  6. Step 6: Final answer
    x = 31,009.75

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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.