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Finding the Fourth Proportional to 91,325.88, 136,999.74 and 38,728.52

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Solution

The fourth proportional to 91,325.88, 136,999.74 and 38,728.52 is: 58,097.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,325.88 : 136,999.74 = 38,728.52 : x
  2. Step 2: Convert to fraction form
    91,325.88/136,999.74 = 38,728.52/x
  3. Step 3: Cross multiply
    91,325.88x = 136,999.74 × 38,728.52
  4. Step 4: Simplify right side
    91,325.88x = 5,305,797,170.58
  5. Step 5: Solve for x
    x = 5,305,797,170.58/91,325.88
  6. Step 6: Final answer
    x = 58,097.41

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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.