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Finding the Fourth Proportional to 62,780, 86,644.08 and 36,284

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Solution

The fourth proportional to 62,780, 86,644.08 and 36,284 is: 50,076.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,780 : 86,644.08 = 36,284 : x
  2. Step 2: Convert to fraction form
    62,780/86,644.08 = 36,284/x
  3. Step 3: Cross multiply
    62,780x = 86,644.08 × 36,284
  4. Step 4: Simplify right side
    62,780x = 3,143,793,798.72
  5. Step 5: Solve for x
    x = 3,143,793,798.72/62,780
  6. Step 6: Final answer
    x = 50,076.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.