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Finding the Fourth Proportional to 73,580.63, 110,372.00 and 20,990.12

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Solution

The fourth proportional to 73,580.63, 110,372.00 and 20,990.12 is: 31,485.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,580.63 : 110,372.00 = 20,990.12 : x
  2. Step 2: Convert to fraction form
    73,580.63/110,372.00 = 20,990.12/x
  3. Step 3: Cross multiply
    73,580.63x = 110,372.00 × 20,990.12
  4. Step 4: Simplify right side
    73,580.63x = 2,316,720,867.83
  5. Step 5: Solve for x
    x = 2,316,720,867.83/73,580.63
  6. Step 6: Final answer
    x = 31,485.47

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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.