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Finding the Fourth Proportional to 91,092.75, 136,639.13 and 28,763.25

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Solution

The fourth proportional to 91,092.75, 136,639.13 and 28,763.25 is: 43,144.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,092.75 : 136,639.13 = 28,763.25 : x
  2. Step 2: Convert to fraction form
    91,092.75/136,639.13 = 28,763.25/x
  3. Step 3: Cross multiply
    91,092.75x = 136,639.13 × 28,763.25
  4. Step 4: Simplify right side
    91,092.75x = 3,930,185,312.16
  5. Step 5: Solve for x
    x = 3,930,185,312.16/91,092.75
  6. Step 6: Final answer
    x = 43,144.88

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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.