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Finding the Fourth Proportional to 56,930.15, 85,335.09 and 18,969.15

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Solution

The fourth proportional to 56,930.15, 85,335.09 and 18,969.15 is: 28,433.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,930.15 : 85,335.09 = 18,969.15 : x
  2. Step 2: Convert to fraction form
    56,930.15/85,335.09 = 18,969.15/x
  3. Step 3: Cross multiply
    56,930.15x = 85,335.09 × 18,969.15
  4. Step 4: Simplify right side
    56,930.15x = 1,618,734,371.35
  5. Step 5: Solve for x
    x = 1,618,734,371.35/56,930.15
  6. Step 6: Final answer
    x = 28,433.69

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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.