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Finding the Fourth Proportional to 73,967.80, 110,955.30 and 20,659.72

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Solution

The fourth proportional to 73,967.80, 110,955.30 and 20,659.72 is: 30,990.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,967.80 : 110,955.30 = 20,659.72 : x
  2. Step 2: Convert to fraction form
    73,967.80/110,955.30 = 20,659.72/x
  3. Step 3: Cross multiply
    73,967.80x = 110,955.30 × 20,659.72
  4. Step 4: Simplify right side
    73,967.80x = 2,292,305,430.52
  5. Step 5: Solve for x
    x = 2,292,305,430.52/73,967.80
  6. Step 6: Final answer
    x = 30,990.59

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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.