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Finding the Fourth Proportional to 72,659.44, 108,995.42 and 20,068.93

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Solution

The fourth proportional to 72,659.44, 108,995.42 and 20,068.93 is: 30,105.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,659.44 : 108,995.42 = 20,068.93 : x
  2. Step 2: Convert to fraction form
    72,659.44/108,995.42 = 20,068.93/x
  3. Step 3: Cross multiply
    72,659.44x = 108,995.42 × 20,068.93
  4. Step 4: Simplify right side
    72,659.44x = 2,187,421,353.96
  5. Step 5: Solve for x
    x = 2,187,421,353.96/72,659.44
  6. Step 6: Final answer
    x = 30,105.12

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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.