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Finding the Fourth Proportional to 91,092.12, 136,644.66 and 28,761

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Solution

The fourth proportional to 91,092.12, 136,644.66 and 28,761 is: 43,143.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,092.12 : 136,644.66 = 28,761 : x
  2. Step 2: Convert to fraction form
    91,092.12/136,644.66 = 28,761/x
  3. Step 3: Cross multiply
    91,092.12x = 136,644.66 × 28,761
  4. Step 4: Simplify right side
    91,092.12x = 3,930,037,066.26
  5. Step 5: Solve for x
    x = 3,930,037,066.26/91,092.12
  6. Step 6: Final answer
    x = 43,143.55

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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.