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Finding the Fourth Proportional to 73,570.78, 110,357.21 and 20,980.27

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Solution

The fourth proportional to 73,570.78, 110,357.21 and 20,980.27 is: 31,470.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,570.78 : 110,357.21 = 20,980.27 : x
  2. Step 2: Convert to fraction form
    73,570.78/110,357.21 = 20,980.27/x
  3. Step 3: Cross multiply
    73,570.78x = 110,357.21 × 20,980.27
  4. Step 4: Simplify right side
    73,570.78x = 2,315,323,572.88
  5. Step 5: Solve for x
    x = 2,315,323,572.88/73,570.78
  6. Step 6: Final answer
    x = 31,470.69

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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.