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Finding the Fourth Proportional to 73,970.80, 110,959.80 and 20,662.72

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Solution

The fourth proportional to 73,970.80, 110,959.80 and 20,662.72 is: 30,995.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,970.80 : 110,959.80 = 20,662.72 : x
  2. Step 2: Convert to fraction form
    73,970.80/110,959.80 = 20,662.72/x
  3. Step 3: Cross multiply
    73,970.80x = 110,959.80 × 20,662.72
  4. Step 4: Simplify right side
    73,970.80x = 2,292,731,278.66
  5. Step 5: Solve for x
    x = 2,292,731,278.66/73,970.80
  6. Step 6: Final answer
    x = 30,995.09

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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.