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Finding the Fourth Proportional to 92,010.75, 138,015.90 and 28,835.70

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Solution

The fourth proportional to 92,010.75, 138,015.90 and 28,835.70 is: 43,253.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,010.75 : 138,015.90 = 28,835.70 : x
  2. Step 2: Convert to fraction form
    92,010.75/138,015.90 = 28,835.70/x
  3. Step 3: Cross multiply
    92,010.75x = 138,015.90 × 28,835.70
  4. Step 4: Simplify right side
    92,010.75x = 3,979,785,087.63
  5. Step 5: Solve for x
    x = 3,979,785,087.63/92,010.75
  6. Step 6: Final answer
    x = 43,253.48

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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.