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Finding the Fourth Proportional to 92,309.20, 138,404.64 and 38,986.73

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Solution

The fourth proportional to 92,309.20, 138,404.64 and 38,986.73 is: 58,455.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,309.20 : 138,404.64 = 38,986.73 : x
  2. Step 2: Convert to fraction form
    92,309.20/138,404.64 = 38,986.73/x
  3. Step 3: Cross multiply
    92,309.20x = 138,404.64 × 38,986.73
  4. Step 4: Simplify right side
    92,309.20x = 5,395,943,638.40
  5. Step 5: Solve for x
    x = 5,395,943,638.40/92,309.20
  6. Step 6: Final answer
    x = 58,455.10

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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.