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Finding the Fourth Proportional to 92,090.79, 138,132 and 28,909.44

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Solution

The fourth proportional to 92,090.79, 138,132 and 28,909.44 is: 43,362.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,090.79 : 138,132 = 28,909.44 : x
  2. Step 2: Convert to fraction form
    92,090.79/138,132 = 28,909.44/x
  3. Step 3: Cross multiply
    92,090.79x = 138,132 × 28,909.44
  4. Step 4: Simplify right side
    92,090.79x = 3,993,318,766.08
  5. Step 5: Solve for x
    x = 3,993,318,766.08/92,090.79
  6. Step 6: Final answer
    x = 43,362.85

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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.