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Finding the Fourth Proportional to 92,686.73, 138,933.77 and 39,412.89

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Solution

The fourth proportional to 92,686.73, 138,933.77 and 39,412.89 is: 59,078.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,686.73 : 138,933.77 = 39,412.89 : x
  2. Step 2: Convert to fraction form
    92,686.73/138,933.77 = 39,412.89/x
  3. Step 3: Cross multiply
    92,686.73x = 138,933.77 × 39,412.89
  4. Step 4: Simplify right side
    92,686.73x = 5,475,781,394.30
  5. Step 5: Solve for x
    x = 5,475,781,394.30/92,686.73
  6. Step 6: Final answer
    x = 59,078.38

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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.