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Finding the Fourth Proportional to 73,580.77, 110,372.19 and 20,990.26

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Solution

The fourth proportional to 73,580.77, 110,372.19 and 20,990.26 is: 31,485.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,580.77 : 110,372.19 = 20,990.26 : x
  2. Step 2: Convert to fraction form
    73,580.77/110,372.19 = 20,990.26/x
  3. Step 3: Cross multiply
    73,580.77x = 110,372.19 × 20,990.26
  4. Step 4: Simplify right side
    73,580.77x = 2,316,740,964.87
  5. Step 5: Solve for x
    x = 2,316,740,964.87/73,580.77
  6. Step 6: Final answer
    x = 31,485.69

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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.