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Finding the Fourth Proportional to 56,277.21, 84,373.89 and 18,815.12

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Solution

The fourth proportional to 56,277.21, 84,373.89 and 18,815.12 is: 28,208.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,277.21 : 84,373.89 = 18,815.12 : x
  2. Step 2: Convert to fraction form
    56,277.21/84,373.89 = 18,815.12/x
  3. Step 3: Cross multiply
    56,277.21x = 84,373.89 × 18,815.12
  4. Step 4: Simplify right side
    56,277.21x = 1,587,504,865.22
  5. Step 5: Solve for x
    x = 1,587,504,865.22/56,277.21
  6. Step 6: Final answer
    x = 28,208.66

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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.